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The California Institute of Technology (branded as Caltech) is a
private Private or privates may refer to: Music * "In Private", by Dusty Springfield from the 1990 album ''Reputation'' * Private (band), a Denmark-based band * "Private" (Ryōko Hirosue song), from the 1999 album ''Private'', written and also recorded ...
research university A research university or a research-intensive university is a university that is committed to research as a central part of its mission. They are "the key sites of Knowledge production modes, knowledge production", along with "intergenerational ...
in
Pasadena, California Pasadena ( ) is a city in Los Angeles County, California, United States, northeast of downtown Los Angeles. It is the most populous city and the primary cultural center of the San Gabriel Valley. Old Pasadena is the city's original commerci ...
, United States. The university is responsible for many modern scientific advancements and is among a small group of institutes of technology in the United States that are devoted to the instruction of pure and applied sciences. The institution was founded as a preparatory and vocational school by Amos G. Throop in 1891 and began attracting influential scientists such as
George Ellery Hale George Ellery Hale (June 29, 1868 – February 21, 1938) was an American astrophysicist, best known for his discovery of magnetic fields in sunspots, and as the leader or key figure in the planning or construction of several world-leading ...
,
Arthur Amos Noyes Arthur Amos Noyes (September 13, 1866 – June 3, 1936) was an American chemist, inventor and educator, born in Newburyport, Massachusetts, son of Amos and Anna Page Noyes, née Andrews. He received a PhD in 1890 from Leipzig University under ...
, and
Robert Andrews Millikan Robert Andrews Millikan ( ; March 22, 1868 – December 19, 1953) was an American physicist who received the Nobel Prize in Physics in 1923 "for his work on the elementary charge of electricity and on the photoelectric effect". Millikan gradua ...
in the early 20th century. The vocational and preparatory schools were disbanded and spun off in 1910, and the college assumed its present name in 1920. In 1934, Caltech was elected to the
Association of American Universities The Association of American Universities (AAU) is an organization of predominantly American research universities devoted to maintaining a strong system of academic research and education. Founded in 1900, it consists of 69 public and private ...
, and the antecedents of
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
's
Jet Propulsion Laboratory The Jet Propulsion Laboratory (JPL) is a Federally funded research and development centers, federally funded research and development center (FFRDC) in La Cañada Flintridge, California, Crescenta Valley, United States. Founded in 1936 by Cali ...
, which Caltech continues to manage and operate, were established between 1936 and 1943 under Theodore von Kármán. Caltech has six academic divisions with strong emphasis on science and engineering, managing $332 million in research grants as of 2010. Its primary campus is located approximately northeast of
downtown Los Angeles Downtown Los Angeles (DTLA) is the central business district of the city of Los Angeles. It is part of the Central Los Angeles region and covers a area. As of 2020, it contains over 500,000 jobs and has a population of roughly 85,000 residents ...
, in Pasadena. First-year students are required to live on campus, and 95% of undergraduates remain in the on-campus housing system at Caltech. Students agree to abide by an honor code which allows faculty to assign take-home examinations. The Caltech Beavers compete in 13 intercollegiate sports in the
NCAA The National Collegiate Athletic Association (NCAA) is a nonprofit organization that regulates College athletics in the United States, student athletics among about 1,100 schools in the United States, and Simon Fraser University, 1 in Canada. ...
Division III's Southern California Intercollegiate Athletic Conference (SCIAC). Scientists and engineers at or from the university have played an essential role in many modern scientific breakthroughs and innovations, including advances in
space research Space research is scientific study carried out in outer space, and by studying outer space. From the use of space technology to the observable universe, space research is a wide research field. Earth science, materials science, biology, medicine ...
,
sustainability science Sustainability science first emerged in the 1980s and has become a new academic discipline. Similar to agricultural science or health science, it is an applied science defined by the practical problems it addresses. Sustainability science focuses ...
,
quantum physics Quantum mechanics is the fundamental physical Scientific theory, theory that describes the behavior of matter and of light; its unusual characteristics typically occur at and below the scale of atoms. Reprinted, Addison-Wesley, 1989, It is ...
, and
seismology Seismology (; from Ancient Greek σεισμός (''seismós'') meaning "earthquake" and -λογία (''-logía'') meaning "study of") is the scientific study of earthquakes (or generally, quakes) and the generation and propagation of elastic ...
. , there are 80 Nobel laureates who have been affiliated with Caltech, making it the institution with the highest number of Nobelists per capita in America. This includes 47 alumni and faculty members (48 prizes, with chemist
Linus Pauling Linus Carl Pauling ( ; February 28, 1901August 19, 1994) was an American chemist and peace activist. He published more than 1,200 papers and books, of which about 850 dealt with scientific topics. ''New Scientist'' called him one of the 20 gre ...
being the only individual in history to win two unshared prizes). In addition, 68
National Medal of Science The National Medal of Science is an honor bestowed by the President of the United States to individuals in science and engineering who have made important contributions to the advancement of knowledge in the fields of behavioral science, behavior ...
Recipients, 43
MacArthur Fellows The MacArthur Fellows Program, also known as the MacArthur Fellowship and colloquially called the "Genius Grant", is a prize awarded annually by the MacArthur Foundation, John D. and Catherine T. MacArthur Foundation to typically between 20 and ...
, 15
National Medal of Technology and Innovation The National Medal of Technology and Innovation (formerly the National Medal of Technology) is an honor granted by the president of the United States to American inventors and innovators who have made significant contributions to the development ...
recipients, 11
astronaut An astronaut (from the Ancient Greek (), meaning 'star', and (), meaning 'sailor') is a person trained, equipped, and deployed by a List of human spaceflight programs, human spaceflight program to serve as a commander or crew member of a spa ...
s, 5 Science Advisors to the President, 4
Fields Medal The Fields Medal is a prize awarded to two, three, or four mathematicians under 40 years of age at the International Congress of Mathematicians, International Congress of the International Mathematical Union (IMU), a meeting that takes place e ...
ists, and 6
Turing Award The ACM A. M. Turing Award is an annual prize given by the Association for Computing Machinery (ACM) for contributions of lasting and major technical importance to computer science. It is generally recognized as the highest distinction in the fi ...
winners have been affiliated with Caltech.


History


Throop College

Caltech started as a vocational school founded in present-day
Old Pasadena Old Pasadena, often referred to as Old Town Pasadena or simply Old Town, is the original commercial center of Pasadena, California, Pasadena, a city in California, United States, and had a latter-day revitalization after a period of decay. Ol ...
on Fair Oaks Avenue and Chestnut Street on September 23, 1891, by local businessman and politician Amos G. Throop. The school was known successively as Throop University, Throop Polytechnic Institute (and Manual Training School) and Throop College of Technology before acquiring its current name in 1920. The vocational school was disbanded and the preparatory program was split off to form the independent Polytechnic School in 1907. At a time when scientific research in the United States was still in its infancy,
George Ellery Hale George Ellery Hale (June 29, 1868 – February 21, 1938) was an American astrophysicist, best known for his discovery of magnetic fields in sunspots, and as the leader or key figure in the planning or construction of several world-leading ...
, a solar
astronomer An astronomer is a scientist in the field of astronomy who focuses on a specific question or field outside the scope of Earth. Astronomers observe astronomical objects, such as stars, planets, natural satellite, moons, comets and galaxy, galax ...
from the
University of Chicago The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...
, founded the
Mount Wilson Observatory The Mount Wilson Observatory (MWO) is an Observatory#Astronomical observatories, astronomical observatory in Los Angeles County, California, United States. The MWO is located on Mount Wilson (California), Mount Wilson, a peak in the San Gabrie ...
in 1904. He joined Throop's board of trustees in 1907, and soon began developing the university, and the whole of Pasadena, into a major scientific and cultural destination. He engineered the appointment of James A. B. Scherer, a literary scholar untutored in science but very capable in administration and fund-raising, to Throop's presidency in 1908. Scherer persuaded retired businessman and trustee Charles W. Gates to donate $25,000 in seed money () to build Gates Laboratory, the first science building on campus.


World Wars

In 1910, Throop moved to its current site. Arthur Fleming donated the land for the permanent campus site.
Theodore Roosevelt Theodore Roosevelt Jr. (October 27, 1858 – January 6, 1919), also known as Teddy or T.R., was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York (state), New York politics, incl ...
delivered an address at Throop Institute on March 21, 1911, and he declared:
I want to see institutions like Throop turn out perhaps ninety-nine of every hundred students as men who are to do given pieces of industrial work better than any one else can do them; I want to see those men do the kind of work that is now being done on the
Panama Canal The Panama Canal () is an artificial waterway in Panama that connects the Caribbean Sea with the Pacific Ocean. It cuts across the narrowest point of the Isthmus of Panama, and is a Channel (geography), conduit for maritime trade between th ...
and on the great irrigation projects in the interior of this country—and the one-hundredth man I want to see with the kind of cultural scientific training that will make him and his fellows the matrix out of which you can occasionally develop a man like your great astronomer, George Ellery Hale.
Also in 1911, a bill was introduced in the
California Legislature The California State Legislature is the bicameral state legislature of the U.S. state of California, consisting of the California State Assembly (lower house with 80 members) and the California State Senate (upper house with 40 members). ...
calling for the establishment of a publicly funded "California Institute of Technology," with an initial budget of a million dollars, ten times the budget of Throop at the time. The board of trustees offered to turn Throop over to the state, but the presidents of
Stanford University Leland Stanford Junior University, commonly referred to as Stanford University, is a Private university, private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth ...
and the
University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a Public university, public Land-grant university, land-grant research university in Berkeley, California, United States. Founded in 1868 and named after t ...
successfully lobbied to defeat the bill, which allowed Throop to develop as the only scientific research-oriented educational institute in southern California, public or private, until the onset of World War II necessitated the broader development of research-based science education. The promise of Throop attracted
physical chemist Physical chemistry is the study of macroscopic and microscopic phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mecha ...
Arthur Amos Noyes Arthur Amos Noyes (September 13, 1866 – June 3, 1936) was an American chemist, inventor and educator, born in Newburyport, Massachusetts, son of Amos and Anna Page Noyes, née Andrews. He received a PhD in 1890 from Leipzig University under ...
from
MIT The Massachusetts Institute of Technology (MIT) is a private research university in Cambridge, Massachusetts, United States. Established in 1861, MIT has played a significant role in the development of many areas of modern technology and sc ...
to develop the institution and assist in establishing it as a center for science and technology. With the onset of
World War I World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
, Hale organized the National Research Council to coordinate and support scientific work on military problems. While he supported the idea of federal appropriations for science, he took exception to a federal bill that would have funded engineering research at land-grant colleges, and instead sought to raise a $1 million national research fund entirely from private sources. To that end, as Hale wrote in ''
The New York Times ''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of ...
'':
Throop College of Technology, in Pasadena California has recently afforded a striking illustration of one way in which the Research Council can secure co-operation and advance scientific investigation. This institution, with its able investigators and excellent research laboratories, could be of great service in any broad scheme of cooperation. President Scherer, hearing of the formation of the council, immediately offered to take part in its work, and with this object, he secured within three days an additional research endowment of one hundred thousand dollars.
Through the National Research Council, Hale simultaneously lobbied for science to play a larger role in national affairs, and for Throop to play a national role in science. The new funds were designated for physics research, and ultimately led to the establishment of the Norman Bridge Laboratory, which attracted experimental
physicist A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate cau ...
Robert Andrews Millikan Robert Andrews Millikan ( ; March 22, 1868 – December 19, 1953) was an American physicist who received the Nobel Prize in Physics in 1923 "for his work on the elementary charge of electricity and on the photoelectric effect". Millikan gradua ...
from the
University of Chicago The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...
in 1917. During the course of the war, Hale, Noyes and Millikan worked together in Washington on the NRC. Subsequently, they continued their partnership in developing Caltech. Under the leadership of Hale, Noyes, and Millikan (aided by the booming economy of
Southern California Southern California (commonly shortened to SoCal) is a geographic and Cultural area, cultural List of regions of California, region that generally comprises the southern portion of the U.S. state of California. Its densely populated coastal reg ...
), Caltech grew to national prominence in the 1920s and concentrated on the development of Roosevelt's "Hundredth Man". On November 29, 1921, the trustees declared it to be the express policy of the institute to pursue scientific research of the greatest importance and at the same time "to continue to conduct thorough courses in engineering and pure science, basing the work of these courses on exceptionally strong instruction in the fundamental sciences of mathematics, physics, and chemistry; broadening and enriching the curriculum by a liberal amount of instruction in such subjects as English, history, and economics; and vitalizing all the work of the Institute by the infusion in generous measure of the spirit of research". In 1923, Millikan was awarded the
Nobel Prize in Physics The Nobel Prize in Physics () is an annual award given by the Royal Swedish Academy of Sciences for those who have made the most outstanding contributions to mankind in the field of physics. It is one of the five Nobel Prizes established by the ...
. In 1925, the school established a department of geology and hired William Bennett Munro, then chairman of the division of History, Government, and Economics at
Harvard University Harvard University is a Private university, private Ivy League research university in Cambridge, Massachusetts, United States. Founded in 1636 and named for its first benefactor, the History of the Puritans in North America, Puritan clergyma ...
, to create a division of
humanities Humanities are academic disciplines that study aspects of human society and culture, including Philosophy, certain fundamental questions asked by humans. During the Renaissance, the term "humanities" referred to the study of classical literature a ...
and
social science Social science (often rendered in the plural as the social sciences) is one of the branches of science, devoted to the study of societies and the relationships among members within those societies. The term was formerly used to refer to the ...
s at Caltech. In 1928, a division of
biology Biology is the scientific study of life and living organisms. It is a broad natural science that encompasses a wide range of fields and unifying principles that explain the structure, function, growth, History of life, origin, evolution, and ...
was established under the leadership of
Thomas Hunt Morgan Thomas Hunt Morgan (September 25, 1866 – December 4, 1945) was an Americans, American evolutionary biologist, geneticist, Embryology, embryologist, and science author who won the Nobel Prize in Physiology or Medicine in 1933 for discoveries e ...
, the most distinguished biologist in the United States at the time, and discoverer of the role of genes and the
chromosome A chromosome is a package of DNA containing part or all of the genetic material of an organism. In most chromosomes, the very long thin DNA fibers are coated with nucleosome-forming packaging proteins; in eukaryotic cells, the most import ...
in heredity. In 1930, Kerckhoff Marine Laboratory was established in Corona del Mar under the care of Professor George MacGinitie. In 1926, a graduate school of
aeronautics Aeronautics is the science or art involved with the study, design process, design, and manufacturing of air flight-capable machines, and the techniques of operating aircraft and rockets within the atmosphere. While the term originally referred ...
was created, which eventually attracted Theodore von Kármán. Kármán later helped create the Jet Propulsion Laboratory, and played an integral part in establishing Caltech as one of the world's centers for rocket science. In 1928, construction of the
Palomar Observatory The Palomar Observatory is an astronomical research observatory in the Palomar Mountains of San Diego County, California, United States. It is owned and operated by the California Institute of Technology (Caltech). Research time at the observat ...
began. Millikan served as "Chairman of the Executive Council" (effectively Caltech's president) from 1921 to 1945, and his influence was such that the institute was occasionally referred to as "Millikan's School". Millikan initiated a visiting-scholars program soon after joining Caltech. Notable scientists who accepted his invitation include
Paul Dirac Paul Adrien Maurice Dirac ( ; 8 August 1902 – 20 October 1984) was an English mathematician and Theoretical physics, theoretical physicist who is considered to be one of the founders of quantum mechanics. Dirac laid the foundations for bot ...
,
Erwin Schrödinger Erwin Rudolf Josef Alexander Schrödinger ( ; ; 12 August 1887 – 4 January 1961), sometimes written as or , was an Austrian-Irish theoretical physicist who developed fundamental results in quantum field theory, quantum theory. In particul ...
,
Werner Heisenberg Werner Karl Heisenberg (; ; 5 December 1901 – 1 February 1976) was a German theoretical physicist, one of the main pioneers of the theory of quantum mechanics and a principal scientist in the German nuclear program during World War II. He pub ...
,
Hendrik Lorentz Hendrik Antoon Lorentz ( ; ; 18 July 1853 – 4 February 1928) was a Dutch theoretical physicist who shared the 1902 Nobel Prize in Physics with Pieter Zeeman for their discovery and theoretical explanation of the Zeeman effect. He derive ...
and
Niels Bohr Niels Henrik David Bohr (, ; ; 7 October 1885 – 18 November 1962) was a Danish theoretical physicist who made foundational contributions to understanding atomic structure and old quantum theory, quantum theory, for which he received the No ...
.
Albert Einstein Albert Einstein (14 March 187918 April 1955) was a German-born theoretical physicist who is best known for developing the theory of relativity. Einstein also made important contributions to quantum mechanics. His mass–energy equivalence f ...
arrived on the Caltech campus for the first time in 1931 to polish up his
Theory of General Relativity General relativity, also known as the general theory of relativity, and as Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern phys ...
, and he returned to Caltech subsequently as a visiting professor in 1932 and 1933. During World War II, Caltech was one of 131 colleges and universities nationally that took part in the
V-12 Navy College Training Program The V-12 Navy College Training Program was designed to supplement the force of commissioned officers in the United States Navy during World War II. Between July 1, 1943, and June 30, 1946, more than 125,000 participants were enrolled in 131 colleg ...
which offered students a path to a Navy commission. The
United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...
also maintained a naval training school for
aeronautical engineering Aerospace engineering is the primary field of engineering concerned with the development of aircraft and spacecraft. It has two major and overlapping branches: aeronautical engineering and astronautical engineering. Avionics engineering is s ...
, resident inspectors of ordinance and naval material, and a liaison officer to the
National Defense Research Committee The National Defense Research Committee (NDRC) was an organization created "to coordinate, supervise, and conduct scientific research on the problems underlying the development, production, and use of mechanisms and devices of warfare" in the U ...
on campus. During the war, some scientists from Caltech, including
J. Robert Oppenheimer J. Robert Oppenheimer (born Julius Robert Oppenheimer ; April 22, 1904 – February 18, 1967) was an American theoretical physics, theoretical physicist who served as the director of the Manhattan Project's Los Alamos Laboratory during World ...
,
Richard Tolman Richard Chace Tolman (March 4, 1881 – September 5, 1948) was an American mathematical physicist and physical chemist who made many contributions to statistical mechanics and theoretical cosmology. He was a professor at the California In ...
, and
Robert Bacher Robert Fox Bacher (August 31, 1905November 18, 2004) was an American nuclear physics, nuclear physicist and one of the leaders of the Manhattan Project. Born in Loudonville, Ohio, Bacher obtained his undergraduate degree and doctorate from the U ...
, were instrumental in the
Manhattan Project The Manhattan Project was a research and development program undertaken during World War II to produce the first nuclear weapons. It was led by the United States in collaboration with the United Kingdom and Canada. From 1942 to 1946, the ...
and contributed to critical aspects of the atomic bomb's development. Caltech was also directly involved in other bomb-related research with a group led by Charles Lauritsen which assisted in the development of the high-explosive lenses used in the
Fat Man "Fat Man" (also known as Mark III) was the design of the nuclear weapon the United States used for seven of the first eight nuclear weapons ever detonated in history. It is also the most powerful design to ever be used in warfare. A Fat Man ...
implosion bomb, crucial to the
Trinity Test Trinity was the first detonation of a nuclear weapon, conducted by the United States Army at 5:29 a.m. MWT (11:29:21 GMT) on July 16, 1945, as part of the Manhattan Project. The test was of an implosion-design plutonium bomb, or "gadg ...
and the subsequent bombing of Nagasaki. Lauritsen's team at Caltech developed detonators that would later be used in atomic bombs. In November 1943, Caltech and the U.S. Navy established the Naval Ordnance Test Station (NOTS) in Inyokern, California, near the
Mojave Desert The Mojave Desert (; ; ) is a desert in the rain shadow of the southern Sierra Nevada mountains and Transverse Ranges in the Southwestern United States. Named for the Indigenous peoples of the Americas, indigenous Mohave people, it is located pr ...
to work on aircraft ordnance and rocket development. One of the most successful innovations was the development of the 5-inch High-Velocity Aircraft Rocket, commonly known as the "
Holy Moses Holy Moses were a German thrash metal band active from 1980 to 1994 and from 2000 to 2023. They were well noted for being fronted by Sabina Classen, who was the only constant member of Holy Moses, and for being one of the first German thrash m ...
," which was used in combat against enemy fortifications and ships. The partnership between the Navy and Caltech continued to deepen throughout the war, leading to the creation of several military technologies, and by 1945, the focus of Caltech's war contributions expanded further with
Project Camel Project Camel encompassed the work performed by the California Institute of Technology (Caltech) in support of the Manhattan Project during World War II. These activities included the development of detonators and other equipment, testing of bomb ...
, a collaboration between the Naval Ordnance Test Station and the Manhattan Project. Caltech scientists worked on a variety of assignments, including
B-29 The Boeing B-29 Superfortress is a retired American four-engined Propeller (aeronautics), propeller-driven heavy bomber, designed by Boeing and flown primarily by the United States during World War II and the Korean War. Named in allusion to ...
airdrop tests of model atomic bombs and the manufacturing of explosives for use in the atomic bomb's implosion mechanism. Additionally, the Salt Wells Pilot Plant at Inyokern was developed with Caltech scientists in response to concerns about the safety of explosive production at Los Alamos and began producing high explosives just days before the Trinity Test in July 1945. Early in the war, Caltech scientists, including Lauritsen's son, Thomas Lauritsen, worked on various rocket designs at the Kellogg Radiation Laboratory. These rockets, including the " Tiny Tim" and the " Mighty Mouse," were used in critical military operations, from naval engagements to land assaults. By the end of the war, Caltech had essentially become an extension of the U.S. Navy's Bureau of Ordnance, with its rocket research providing important technology to U.S. combat capabilities.


Project Vista

From April to December 1951, Caltech was the host of a federal classified study,
Project Vista Project Vista was a top secret study conducted by prominent physicists, researchers, military officers, and staff at California Institute of Technology from April 1 to December 1, 1951. The project got its name from the Vista del Arroyo Hotel i ...
. The selection of Caltech as host for the project was based on the university's expertise in rocketry and nuclear physics. In response to the war in Korea and the pressure from the Soviet Union, the project was Caltech's way of assisting the federal government in its effort to increase national security. The project was created to study new ways of improving the relationship between tactical air support and ground troops. The Army, Air Force, and Navy sponsored the project; however, it was under contract with the Army. The study was named after the hotel, Vista del Arroyo Hotel, which housed the study. The study operated under a committee with the supervision of President Lee A. DuBridge. William A. Fowler, a professor at Caltech, was selected as research director. More than a fourth of Caltech's faculty and a group of outside scientists staffed the project. Moreover, the number increases if one takes into account visiting scientists, military liaisons, secretarial, and security staff. In compensation for its participation, the university received about $750,000.


Post-war growth

From the 1950s to 1980s, Caltech was the home of
Murray Gell-Mann Murray Gell-Mann (; September 15, 1929 – May 24, 2019) was an American theoretical physicist who played a preeminent role in the development of the theory of elementary particles. Gell-Mann introduced the concept of quarks as the funda ...
and
Richard Feynman Richard Phillips Feynman (; May 11, 1918 – February 15, 1988) was an American theoretical physicist. He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of t ...
, whose work was central to the establishment of the
Standard Model The Standard Model of particle physics is the Scientific theory, theory describing three of the four known fundamental forces (electromagnetism, electromagnetic, weak interaction, weak and strong interactions – excluding gravity) in the unive ...
of particle physics. Feynman was also widely known outside the physics community as an exceptional teacher and a colorful, unconventional character. During Lee A. DuBridge's tenure as Caltech's president (1946–1969), Caltech's faculty doubled and the campus tripled in size. DuBridge, unlike his predecessors, welcomed federal funding of science. New research fields flourished, including
chemical biology Chemical biology is a scientific discipline between the fields of chemistry and biology. The discipline involves the application of chemical techniques, analysis, and often small molecules produced through synthetic chemistry, to the study and m ...
,
planetary science Planetary science (or more rarely, planetology) is the scientific study of planets (including Earth), celestial bodies (such as moons, asteroids, comets) and planetary systems (in particular those of the Solar System) and the processes of ...
,
nuclear astrophysics Nuclear astrophysics studies the origin of the chemical elements and isotopes, and the role of nuclear energy generation, in cosmic sources such as stars, supernovae, novae, and violent binary-star interactions. It is an interdisciplinary part ...
, and
geochemistry Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. The realm of geochemistry extends beyond the Earth, encompassing the e ...
. A 200-inch telescope was dedicated on nearby Palomar Mountain in 1948 and remained the world's most powerful optical telescope for over forty years. Caltech opened its doors to female undergraduates during the presidency of Harold Brown in 1970, and they made up 14% of the entering class. The portion of female undergraduates has been increasing since then. Protests by Caltech students are rare. The earliest was a 1968 protest outside the
NBC The National Broadcasting Company (NBC) is an American commercial broadcast television and radio network serving as the flagship property of the NBC Entertainment division of NBCUniversal, a subsidiary of Comcast. It is one of NBCUniversal's ...
Burbank studios, in response to rumors that NBC was to cancel ''
Star Trek ''Star Trek'' is an American science fiction media franchise created by Gene Roddenberry, which began with the Star Trek: The Original Series, series of the same name and became a worldwide Popular culture, pop-culture Cultural influence of ...
''. In 1973, the students from Dabney House protested a presidential visit with a sign on the library bearing the simple phrase " Impeach Nixon". The following week, Ross McCollum, president of the National Oil Company, wrote an open letter to Dabney House stating that in light of their actions he had decided not to donate one million dollars to Caltech. The Dabney family, being Republicans, disowned Dabney House after hearing of the protest.


21st century

Since 2000, the Einstein Papers Project has been located at Caltech. The project was established in 1986 to assemble, preserve, translate, and publish papers selected from the literary estate of Albert Einstein and from other collections. In fall 2008, the freshman class was 42% female, a record for Caltech's undergraduate enrollment. In the same year, the Institute concluded a six-year-long fund-raising campaign. The campaign raised more than $1.4 billion from about 16,000 donors. Nearly half of the funds went into the support of Caltech programs and projects. In 2010, Caltech, in partnership with
Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory (LBNL, Berkeley Lab) is a Federally funded research and development centers, federally funded research and development center in the Berkeley Hills, hills of Berkeley, California, United States. Established i ...
and headed by Professor Nathan Lewis, established a DOE Energy Innovation Hub aimed at developing revolutionary methods to generate fuels directly from sunlight. This hub, the Joint Center for Artificial Photosynthesis, will receive up to $122 million in federal funding over five years. Since 2012, Caltech began to offer classes through
massive open online course A massive open online course (MOOC ) or an open online course is an online course aimed at unlimited participation and open access via the World Wide Web, Web. In addition to traditional course materials, such as filmed lectures, readings, and p ...
s (MOOCs) under
Coursera Coursera Inc. () is an American global massive open online course provider. It was founded in 2012 by Stanford University computer science professors Andrew Ng and Daphne Koller. Coursera works with universities and other organizations to offe ...
, from 2013,
edX edX is an American For-profit higher education in the United States, for-profit massive open online course provider. It was founded by MIT and Harvard. It is a subsidiary of 2U (company), 2U. History edX was founded in May 2012 by the admi ...
, and bootcamps. Jean-Lou Chameau, the eighth president, announced on February 19, 2013, that he would be stepping down to accept the presidency at
King Abdullah University of Science and Technology The King Abdullah University of Science and Technology (KAUST; ') is a Private university, private research university located in Thuwal, Saudi Arabia. Founded in 2009, the university provides research and graduate training programs in English ...
. Thomas F. Rosenbaum was announced to be the ninth president of Caltech on October 24, 2013, and his term began on July 1, 2014. In 2019, Caltech received a gift of $750 million for sustainability research from the Resnick family of The Wonderful Company. The gift is the largest ever for environmental sustainability research and the second-largest private donation to a US academic institution (after Bloomberg's gift of $1.8 billion to Johns Hopkins University in 2018). On account of President Robert A. Millikan's affiliation with the Human Betterment Foundation, in January 2021, the Caltech Board of Trustees authorized the removal of Millikan's name (and the names of five other historical figures affiliated with the Foundation), from campus buildings.Rosenbaum, Thomas
Statement from the President
California Institute of Technology. Retrieved January 15, 2021.


Campus

Caltech's primary campus is located in
Pasadena, California Pasadena ( ) is a city in Los Angeles County, California, United States, northeast of downtown Los Angeles. It is the most populous city and the primary cultural center of the San Gabriel Valley. Old Pasadena is the city's original commerci ...
, approximately northeast of
downtown Los Angeles Downtown Los Angeles (DTLA) is the central business district of the city of Los Angeles. It is part of the Central Los Angeles region and covers a area. As of 2020, it contains over 500,000 jobs and has a population of roughly 85,000 residents ...
. It is within walking distance of
Old Town Pasadena Old Pasadena, often referred to as Old Town Pasadena or simply Old Town, is the original commercial center of Pasadena, a city in California, United States, and had a latter-day revitalization after a period of decay. Old Pasadena began as t ...
and the Pasadena Playhouse District and therefore the two locations are frequent getaways for Caltech students. In 1917 Hale hired architect Bertram Goodhue to produce a master plan for the campus. Goodhue conceived the overall layout of the campus and designed the physics building, Dabney Hall, and several other structures, in which he sought to be consistent with the local climate, the character of the school, and Hale's educational philosophy. Goodhue's designs for Caltech were also influenced by the traditional Spanish mission architecture of Southern California. During the 1960s, Caltech underwent considerable expansion, in part due to the philanthropy of alumnus Arnold O. Beckman. In 1953, Beckman was asked to join the Caltech Board of Trustees. In 1964, he became its chairman. Over the next few years, as Caltech's president emeritus
David Baltimore David Baltimore (born March 7, 1938) is an American biologist, university administrator, and 1975 Nobel Prize in Physiology or Medicine, Nobel laureate in Physiology or Medicine. He is a professor of biology at the California Institute of Tech ...
describes it, Arnold Beckman and his wife Mabel "shaped the destiny of Caltech". In 1971 a magnitude-6.6 earthquake in San Fernando caused some damage to the Caltech campus. Engineers who evaluated the damage found that two historic buildings dating from the early days of the Institute—Throop Hall and the Goodhue-designed Culbertson Auditorium—had cracked. New additions to the campus include the Cahill Center for Astronomy and Astrophysics and the
Walter Walter may refer to: People and fictional characters * Walter (name), including a list of people and fictional and mythical characters with the given name or surname * Little Walter, American blues harmonica player Marion Walter Jacobs (1930–19 ...
and Leonore Annenberg Center for Information Science and Technology, which opened in 2009, and the Warren and Katherine Schlinger Laboratory for Chemistry and Chemical Engineering followed in March 2010. The institute also concluded an upgrading of the South Houses in 2006. In late 2010, Caltech completed a 1.3 MW solar array projected to produce approximately 1.6 GWh in 2011. File:Caltech from the air.jpg, Aerial view of Caltech in
Pasadena, California Pasadena ( ) is a city in Los Angeles County, California, United States, northeast of downtown Los Angeles. It is the most populous city and the primary cultural center of the San Gabriel Valley. Old Pasadena is the city's original commerci ...
File:Robert A. Millikan Memorial Library at Caltech.jpg, Millikan Library, the tallest building on campus. File:Beckman auditorium, Caltech.jpg, The Beckman Auditorium File:Beckman Institute Reflection.jpg, Beckman Institute at Caltech File:Norman Bridge Lab Interior.jpg, The Bridge Laboratory of Physics File:Broad center.jpg, Broad Center for Biological Sciences File:Annenberg center.jpg, Annenberg Center for Information Science and Technology File:Arms Laboratory.JPG, Breezeway of Arms Laboratory File:Kerckhoff Laboratory of the Biological Sciences.jpg, Kerckhoff Laboratory of the Biological Sciences File:SchlingerLabChemE.jpg, Schlinger Laboratory for Chemistry and Chemical Engineering File:Cahill Center for Astronomy and Astrophysics ( Caltech).jpg, Cahill Center for Astronomy and Astrophysics File:Fleming cannon firing.jpg, Fleming cannon


Organization and administration

Caltech is incorporated as a non-profit corporation and is governed by a privately appointed 46-member
board of trustees A board of directors is a governing body that supervises the activities of a business, a nonprofit organization, or a government agency. The powers, duties, and responsibilities of a board of directors are determined by government regulatio ...
who serve five-year terms of office and retire at the age of 72. The trustees elect a president to serve as the chief executive officer of the institute and administer the affairs on the institute on behalf of the board, a provost who serves as the chief academic officer of the institute below the president, and ten other vice presidential and other senior positions. Thomas F. Rosenbaum became the ninth president of Caltech in 2014. Caltech's endowment is governed by a permanent trustee committee and administered by an investment office. The institute is organized into six primary academic divisions: Biology and Biological Engineering (founded 1927), Chemistry and Chemical Engineering (founded 1926), Engineering and Applied Science (founded 1926), Geological and Planetary Sciences (founded 1927), Humanities and Social Sciences (founded 1926), Physics, Mathematics, and Astronomy (founded 1926). Given Caltech's historical prestige and the small size of its faculty in many major fields, the institution is exceptionally careful in selecting candidates. This rigorous process can result in some positions remaining unfilled for several years until the right candidate is found. Caltech dedicates significant resources to attract top-tier faculty and provides them with substantial financial support to foster their research and academic endeavors. The voting faculty of Caltech include all professors, instructors, research associates and fellows, and the University Librarian. Faculty are responsible for establishing admission requirements, academic standards, and curricula. The Faculty Board is the faculty's representative body and consists of 18 elected faculty representatives as well as other senior administration officials. Full-time professors are expected to teach classes, conduct research, advise students, and perform administrative work such as serving on committees. Founded in 1930s, the
Jet Propulsion Laboratory The Jet Propulsion Laboratory (JPL) is a Federally funded research and development centers, federally funded research and development center (FFRDC) in La Cañada Flintridge, California, Crescenta Valley, United States. Founded in 1936 by Cali ...
(JPL) is a federally funded research and development center (FFRDC) owned by
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
and operated as a division of Caltech through a contract between NASA and Caltech. In 2008, JPL spent over $1.6 billion on research and development and employed over 5,000 project-related and support employees. The JPL Director also serves as a Caltech Vice President and is responsible to the President of the Institute for the management of the laboratory. In December 2023, graduate students and postdoctoral researchers filed to be recognized for collective bargaining a
Caltech Grad researchers and Postdocs United
in affiliation with the
United Auto Workers The United Auto Workers (UAW), fully named International Union, United Automobile, Aerospace and Agricultural Implement Workers of America, is an American labor union that represents workers in the United States (including Puerto Rico) and sou ...
(C/GPU-UAW). On January 31 and February 1, 2024, a vote was held by the
National Labor Relations Board The National Labor Relations Board (NLRB) is an Independent agencies of the United States government, independent agency of the federal government of the United States that enforces United States labor law, U.S. labor law in relation to collect ...
(NLRB). In February 2024, the NLRB certified that 1335 of 1997 eligible workers voted, with 78% voting in favor of unionization. In May 2024, contract negotiations began. In December 2024, C/GPU-UAW members held a strike authorization vote, 1441 participating in the vote, and 86% voting in favor of authorizing the C/GPU bargaining team to call a strike, if necessary.


Academics

Caltech is a small four-year, highly residential research university with slightly more students in graduate programs than undergraduate. The institute has been accredited by the
Western Association of Schools and Colleges The Western Association of Schools and Colleges (WASC ( )) provided accreditation of public and private universities, colleges, secondary and elementary schools in California and Hawaii, the territories of Guam, American Samoa and Northern ...
since 1949. Caltech is on the
quarter system An academic quarter refers to the division of an academic year into four parts, which commonly are not all exactly three months or thirteen weeks long due to breaks between terms. Historical context The modern academic quarter calendar can be ...
: the fall term starts in late September and ends before Christmas, the second term starts after New Year's Day and ends in mid-March, and the third term starts in late March or early April and ends in early June.


Rankings

Caltech was ranked within the top ten universities in the world by the
Times Higher Education World University Rankings The ''Times Higher Education World University Rankings'', often referred to as the THE Rankings, is the annual publication of university rankings by the ''Times Higher Education'' magazine. The publisher had collaborated with Quacquarelli Symon ...
,
QS World University Rankings The ''QS World University Rankings'' is a portfolio of comparative college and university rankings compiled by Quacquarelli Symonds, a higher education analytics firm. Its first and earliest edition was published in collaboration with '' Times ...
, and
Academic Ranking of World Universities The ''Academic Ranking of World Universities'' (''ARWU''), also known as the Shanghai Ranking, is one of the annual publications of world university rankings. The league table was originally compiled and issued by Shanghai Jiao Tong Universi ...
''.'' For 2022, U.S. News & World Report ranked Caltech as tied for 9th in the United States among national universities overall, 11th for most innovative, and 15th for best value. ''U.S. News & World Report'' also ranked the graduate programs in chemistry and earth sciences first among national universities.


Undergraduate admissions

Admission to Caltech is extremely rigorous. Prior to going test blind, Caltech students had the highest test scores in the nation. In admissions for the Class of 2028 (entering 2024), Caltech was ranked the hardest college in America to gain acceptance to by admit rate, at an all-time low of 2.7%. For the freshmen who enrolled in 2019 (Class of 2023) the middle 50% range of
SAT The SAT ( ) is a standardized test widely used for college admissions in the United States. Since its debut in 1926, its name and Test score, scoring have changed several times. For much of its history, it was called the Scholastic Aptitude Test ...
were 740–780 for evidence-based reading and writing and 790–800 for math, and 1530–1570 total. The middle 50% range ACT Composite score was 35–36. The SAT Math Level 2 middle 50% range was 800–800. The middle 50% range for the SAT Physics Subject Test was 760–800; SAT Chemistry Subject Test was 760–800; SAT Biology Subject Tests was 760–800. In June 2020, Caltech announced a test-blind policy where they would not require nor consider test scores for the next two years. The moratorium was extended twice, starting July 2021, but was subsequently cancelled starting with the Class of 2029. The institute is
need-blind Need-blind admission in the United States refers to a college admission policy that does not take into account an applicant's financial status when deciding whether to accept them. This approach typically results in a higher percentage of accepted ...
for domestic applicants. For the Class of 2027 (enrolled Fall 2023), Caltech received 13,136 applications and accepted 412 applicants for a 3.14% admit rate; 270 enrolled. The subsequent year, for the Class of 2028, Caltech reduced the number of seats by almost one hundred, accepting 315 applicants out of approximately 13,000 total applications. For the Class of 2025, 32% were of underrepresented ancestry (which includes students who self-identify as American Indian/Alaska Native, Hispanic/Latino, Black/African American, and/or Native Hawaiian/Pacific Islander), and 6% were foreign students.


Tuition and financial aid

Undergraduate tuition for the 2021–2022 school year was $56,394 and total annual costs were estimated to be $79,947 excluding the Caltech Student Health Insurance Plan. In 2012–2013, Caltech awarded $17.1 million in need-based aid, $438k in non-need-based aid, and $2.51 million in self-help support to enrolled undergraduate students. The average financial aid package of all students eligible for aid was $38,756 and students graduated with an average debt of $15,090.


Undergraduate program

The full-time, four-year undergraduate program emphasizes instruction in the arts and sciences and has high graduate coexistence. Caltech offers 28 majors (called "options") and 17 minors across all six academic divisions. Caltech also offers interdisciplinary programs in Applied Physics, Biochemistry, Bioengineering, Computation and Neural Systems, Control and Dynamical Systems, Environmental Science and Engineering, Geobiology and Astrobiology, Geochemistry, and Planetary Astronomy. The most popular options are Chemical Engineering, Computer Science, Electrical Engineering, Mechanical Engineering and Physics. The most popular majors of the class of 2023 were Computer Science, Mechanical Engineering, Physics, and Electrical Engineering. Prior to the entering class of 2013, Caltech required students to take a core curriculum of five terms of mathematics, five terms of physics, two terms of chemistry, one term of biology, two terms of lab courses, one term of scientific communication, three terms of physical education, and 12 terms of humanities and social science. Since 2013, only three terms each of mathematics and physics have been required by the institute, with the remaining two terms each required by certain options. A typical class is worth 9 academic units and given the extensive core curriculum requirements in addition to individual options' degree requirements, students need to take an average of 40.5 units per term (more than four classes) to graduate in four years. 36 units is the minimum full-time load, 48 units is considered a heavy load, and registrations above 51 units require an overload petition. Approximately 20 percent of students double-major. This is achievable since the humanities and social sciences majors have been designed to be done in conjunction with a science major. Although choosing two options in the same division is discouraged, it is still possible. First-year students are enrolled in first-term classes based upon results of placement exams in math, physics, chemistry, and writing and take all classes in their first two terms on a Pass/Fail basis. There is little competition; collaboration on
homework Homework is a set of tasks assigned to students by their teachers to be completed at home. Common homework assignments may include required reading, a writing or typing project, Exercise (mathematics), math problems to be completed, informatio ...
is encouraged and the honor system encourages take-home tests and flexible homework schedules. Caltech offers co-operative programs with other schools, such as the Pasadena
Art Center College of Design The ArtCenter College of Design is a private art college in Pasadena, California. It was incorporated in 1930 as a degree-granting institution of higher learning in the US created specifically for students of both the visual arts and design. ...
and
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. According to a PayScale study, Caltech graduates earn a median early career salary of $83,400 and $143,100 mid-career, placing them in the top 5 among graduates of US colleges and universities. The average net return on investment over a period of 20 years is $887,000, the tenth-highest among US colleges. Caltech offers Army and Air Force
ROTC The Reserve Officers' Training Corps (ROTC; or ) is a group of college- and university-based officer-training programs for training commissioned officers of the United States Armed Forces. While ROTC graduate officers serve in all branches o ...
in cooperation with the
University of Southern California The University of Southern California (USC, SC, or Southern Cal) is a Private university, private research university in Los Angeles, California, United States. Founded in 1880 by Robert M. Widney, it is the oldest private research university in ...
.


Graduate program

Admission to Caltech's graduate study is highly competitive, with faculty evaluating factors such as academic preparation, research experience, scientific interests, and recommendations from teachers or mentors. A key aspect of the admission process is the matching of faculty and an applicant's research interests. Historically, many programs required applicants to submit GRE scores. However, in recent years, many departments have made the GRE optional or no longer require it at all. The graduate instructional programs emphasize doctoral studies and are dominated by science, technology, engineering, and mathematics fields. The institute offers graduate degree programs for the Master of Science, Engineer's Degree, Doctor of Philosophy, BS/MS and MD/PhD, with the majority of students in the PhD program. The most popular options are Chemistry, Physics, Biology, Electrical Engineering, and Chemical Engineering. Initially, most new graduate students are assigned a temporary advisor, allowing time to select a permanent advisor. To aid in this, some graduate options include rotations in research labs, facilitating a better match with faculty research groups that align with the students' scientific interests. Up to three rotations in the first year are allowed in some options. Caltech provides on-campus housing options for incoming graduate students. All new graduate students are guaranteed housing in their first year, with a variety of living experiences available to suit different needs. Approximately half of Caltech's graduate student population resides in campus housing. The application period for new student housing opens on April 15, 2023, and closes on April 30, 2023. Post-first year, students participate in a housing lottery, with the results announced two months prior to the contract end date, aiding in planning for those who need to seek off-campus housing. The research facilities at Caltech are available to graduate students, but there are opportunities for students to work in facilities of other universities, research centers (such as NASA's Jet Propulsion Laboratory), and private industries. The graduate student to faculty ratio is 4:1. A joint program also exists between Caltech and the Keck School of Medicine of the University of Southern California, the UCLA David Geffen School of Medicine, and the Kaiser Permanente Bernard J. Tyson School of Medicine, which grants MD/PhD degrees. Students in this program do their preclinical and clinical work at
USC USC may refer to: Education United States * Universidad del Sagrado Corazón, Santurce, Puerto Rico * University of South Carolina, Columbia, South Carolina ** University of South Carolina System, a state university system of South Carolina * ...
,
UCLA The University of California, Los Angeles (UCLA) is a public land-grant research university in Los Angeles, California, United States. Its academic roots were established in 1881 as a normal school then known as the southern branch of the C ...
, or KPSOM, and their PhD work with any member of the Caltech faculty, including the Biology, Chemistry, and Engineering and Applied Sciences Divisions. The MD degree would be from the student's respective medical school and the PhD would be awarded from Caltech. Approximately 99 percent of doctoral students have full financial support. Financial support for graduate students comes in the form of fellowships, research assistantships, teaching assistantships or a combination of fellowship and assistantship support. Graduate students are bound by the same honor code as the undergraduates, allowing for take-home examinations. The Graduate Honor Council oversees any violations of the code.


Research

Caltech is
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among "R1: Doctoral Universities – Very High Research Activity". Caltech was elected to the
Association of American Universities The Association of American Universities (AAU) is an organization of predominantly American research universities devoted to maintaining a strong system of academic research and education. Founded in 1900, it consists of 69 public and private ...
in 1934 and remains a research university with "very high" research activity, primarily in
STEM fields Science, technology, engineering, and mathematics (STEM) is an umbrella term used to group together the distinct but related technical disciplines of science, technology, engineering, and mathematics. The term is typically used in the context o ...
. Caltech manages research expenditures of $270 million annually, 66th among all universities in the U.S. and 17th among private institutions without medical schools for 2008. The largest federal agencies contributing to research are
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
,
National Science Foundation The U.S. National Science Foundation (NSF) is an Independent agencies of the United States government#Examples of independent agencies, independent agency of the Federal government of the United States, United States federal government that su ...
,
Department of Health and Human Services The United States Department of Health and Human Services (HHS) is a cabinet-level executive branch department of the US federal government created to protect the health of the US people and providing essential human services. Its motto is ...
,
Department of Defense The United States Department of Defense (DoD, USDOD, or DOD) is an executive department of the U.S. federal government charged with coordinating and supervising the six U.S. armed services: the Army, Navy, Marines, Air Force, Space Force, ...
, and Department of Energy. Caltech received $144 million in federal funding for the physical sciences, $40.8 million for the life sciences, $33.5 million for engineering, $14.4 million for environmental sciences, $7.16 million for computer sciences, and $1.97 million for mathematical sciences in 2008. The institute was awarded an all-time high funding of $357 million in 2009. Active funding from the
National Science Foundation The U.S. National Science Foundation (NSF) is an Independent agencies of the United States government#Examples of independent agencies, independent agency of the Federal government of the United States, United States federal government that su ...
Directorate of Mathematical and Physical Science (MPS) for Caltech stands at $343 million , the highest for any educational institution in the nation, and higher than the total funds allocated to any state except California and New York. In 2005, Caltech had dedicated to research: to physical sciences, to engineering, and to biological sciences. In addition to managing JPL, Caltech also operates the
Palomar Observatory The Palomar Observatory is an astronomical research observatory in the Palomar Mountains of San Diego County, California, United States. It is owned and operated by the California Institute of Technology (Caltech). Research time at the observat ...
in
San Diego County San Diego County (), officially the County of San Diego, is a county in the southwest corner of the U.S. state of California, north to its border with Mexico. As of the 2020 census, the population was 3,298,634; it is the second-most populous ...
, the Owens Valley Radio Observatory in
Bishop, California Bishop (formerly Bishop Creek) is the only incorporated city in Inyo County, California, United States. It is located near the northern end of the Owens Valley within the Mojave Desert, at an elevation of . The city was named after Bishop Creek ...
, the Submillimeter Observatory and W. M. Keck Observatory at the Mauna Kea Observatory, the Laser Interferometer Gravitational-Wave Observatory at Livingston, Louisiana and
Richland, Washington Richland () is a city in Benton County, Washington, United States. It is located in southeastern Washington at the confluence of the Yakima River, Yakima and the Columbia River, Columbia Rivers. As of the 2020 census, the city's population was ...
, and Kerckhoff Marine Laboratory in Corona del Mar, California. The Institute launched the Kavli Nanoscience Institute at Caltech in 2006, the Keck Institute for Space Studies in 2008, and is also the current home for the Einstein Papers Project. The Spitzer Science Center (SSC), part of the
Infrared Processing and Analysis Center The Infrared Processing and Analysis Center (IPAC) provides science operations, data management, data archives and community support for astronomy and planetary science missions. IPAC has a historical emphasis on infrared-submillimeter astronomy a ...
located on the Caltech campus, is the data analysis and community support center for
NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
's
Spitzer Space Telescope The Spitzer Space Telescope, formerly the Space Infrared Telescope Facility (SIRTF), was an infrared space telescope launched in 2003, that was deactivated when operations ended on 30 January 2020. Spitzer was the third space telescope dedicate ...
. Caltech partnered with
UCLA The University of California, Los Angeles (UCLA) is a public land-grant research university in Los Angeles, California, United States. Its academic roots were established in 1881 as a normal school then known as the southern branch of the C ...
to establish a Joint Center for Translational Medicine (UCLA-Caltech JCTM), which conducts experimental research into clinical applications, including the diagnosis and treatment of diseases such as cancer. In 1997, Caltech partnered with UCLA to train physician-scientists. Caltech operates several
TCCON The Total Carbon Column Observing Network (TCCON) is a global network of instruments that measure the amount of carbon dioxide, methane, carbon monoxide, nitrous oxide and other trace gases in the Earth's atmosphere. The TCCON ( ) began in 2004 w ...
stations as part of an international collaborative effort of measuring greenhouse gases globally. One station is on campus. Undergraduates at Caltech are also encouraged to participate in research. About 80% of the class of 2010 did research through the annual Summer Undergraduate Research Fellowships (SURF) program at least once during their stay, and many continued during the school year. Students write and submit SURF proposals for research projects in collaboration with professors, and about 70 percent of applicants are awarded SURFs. The program is open to both Caltech and non-Caltech undergraduate students. It serves as preparation for graduate school and helps to explain why Caltech has the highest percentage of alumni who go on to receive a PhD of all the major universities. The licensing and transferring of technology to the commercial sector is managed by the Office of
Technology Transfer Technology transfer (TT), also called transfer of technology (TOT), is the process of transferring (disseminating) technology from the person or organization that owns or holds it to another person or organization, in an attempt to transform invent ...
(OTT). OTT protects and manages the intellectual property developed by faculty members, students, other researchers, and JPL technologists. Caltech receives more invention disclosures per faculty member than any other university in the nation. , 1891 patents were granted to Caltech researchers since 1969.


Students

Caltech enrolled 987 undergraduate students and 1,410 graduate students for the 2021–2022 school year. Women made up 45% of the undergraduate and 33% of the graduate student body. The racial demographics of the school substantially differ from those of the nation as a whole. The four-year graduation rate is 79% and the six-year rate is 92%, which is low compared to most leading U.S. universities, but substantially higher than it was in the 1960s and 1970s. Students majoring in
STEM fields Science, technology, engineering, and mathematics (STEM) is an umbrella term used to group together the distinct but related technical disciplines of science, technology, engineering, and mathematics. The term is typically used in the context o ...
traditionally have graduation rates below 70%. Table notes:


Student life


House system

During the early 20th century, a Caltech committee visited several universities and decided to transform the undergraduate housing system from
fraternities A fraternity (; whence, " brotherhood") or fraternal organization is an organization, society, club or fraternal order traditionally of men but also women associated together for various religious or secular aims. Fraternity in the Western conce ...
to a
house system The house system is a traditional feature of schools in the United Kingdom. The practice has since spread to Commonwealth of Nations, Commonwealth countries. The school is divided into units called "houses" and each student is allocated to on ...
. Four South Houses (or ''Hovses'', as styled in the stone engravings) were built: Blacker House, Dabney House, Fleming House and Ricketts House. In the 1960s, three North Houses were built: Lloyd House, Page House, and Ruddock House, and during the 1990s, Avery House. The four South Houses closed for renovation in 2005 and reopened in 2006. The latest addition to residential life at Caltech is Bechtel Residence, which opened in 2018. It is not affiliated with the house system. All first- and second-year students live on campus in the house system or in the Bechtel Residence. On account of Albert B. Ruddock's affiliation with the Human Betterment Foundation, in January 2021, the Caltech Board of Trustees authorized the removal of Ruddock's name from campus buildings. Ruddock House was renamed as the Grant D. Venerable House.


Athletics

Caltech has athletic teams in baseball, men's and women's basketball, cross country, men's and women's soccer, swimming and diving, men's and women's tennis, track and field, women's volleyball, and men's and women's water polo. Caltech's mascot is the Beaver, a homage to nature's engineer. Its teams are members of the
NCAA The National Collegiate Athletic Association (NCAA) is a nonprofit organization that regulates College athletics in the United States, student athletics among about 1,100 schools in the United States, and Simon Fraser University, 1 in Canada. ...
Division III and compete in the Southern California Intercollegiate Athletic Conference (SCIAC), which Caltech co-founded in 1915. On January 6, 2007, the Beavers' men's basketball team snapped a 207-game losing streak to Division III schools, beating
Bard College Bard College is a private college, private Liberal arts colleges in the United States, liberal arts college in Annandale-on-Hudson, New York. The campus overlooks the Hudson River and Catskill Mountains within the Hudson River Historic District ...
81–52. It was their first Division III victory since 1996. Until their win over
Occidental College Occidental College (informally Oxy) is a private liberal arts college in Los Angeles, California, United States. Founded in 1887 as a coeducational college by clergy and members of the Presbyterian Church, it became non-sectarian in 1910. It is ...
on February 22, 2011 the team had not won a game in SCIAC play since 1985. Ryan Elmquist's free throw with 3.3 seconds in regulation gave the Beavers the victory. The documentary film '' Quantum Hoops'' concerns the events of the Beavers' 2005–06 season. On January 13, 2007, the Caltech women's basketball team snapped a 50-game losing streak, defeating the Pomona- Pitzer Sagehens 55–53. The women's program, which entered the SCIAC in 2002, garnered their first conference win. On the bench as honorary coach for the evening was Robert Grubbs, 2005 Nobel laureate in Chemistry. The team went on to beat
Whittier College Whittier College is a Private university, private Liberal arts colleges in the United States, liberal arts college in Whittier, California. It is a Hispanic-serving institution, Hispanic Serving Institution (HSI) and, as of spring 2024, had 815 ...
on February 10, for its second SCIAC win, and placed its first member on the All Conference team. In 2007, 2008, and 2009, the women's table tennis team (a club team) competed in nationals. The women's
Ultimate Ultimate or Ultimates may refer to: Arts, entertainment, and media Music Albums *Ultimate (Bryan Adams album), ''Ultimate'' (Bryan Adams album) *Ultimate (Jolin Tsai album), ''Ultimate'' (Jolin Tsai album) *Ultimate (Pet Shop Boys album), ''Ult ...
club team, known as "Snatch", has also been very successful in recent years, ranking 44 of over 200 college teams in the Ultimate Player's Association. On February 2, 2013, the Caltech baseball team ended a 228-game losing streak, the team's first win in nearly 10 years. The track and field team's home venue is at the South Athletic Field in
Tournament Park Tournament Park is a park and athletics venue in Pasadena, California, United States, northeast of Los Angeles. Currently maintained by the California Institute of Technology, it was simply known as the "town lot" before being renamed "Tournament ...
, the site of the first eight Rose Bowl games. The school also sponsored an intercollegiate
football Football is a family of team sports that involve, to varying degrees, kick (football), kicking a football (ball), ball to score a goal (sports), goal. Unqualified, football (word), the word ''football'' generally means the form of football t ...
team from 1973 through 1977, and played part of its home schedule at the Rose Bowl.


Performing and visual arts

The Caltech/
Occidental College Occidental College (informally Oxy) is a private liberal arts college in Los Angeles, California, United States. Founded in 1887 as a coeducational college by clergy and members of the Presbyterian Church, it became non-sectarian in 1910. It is ...
Orchestra is a full seventy-piece orchestra composed of students, faculty, and staff at Caltech and nearby Occidental College. The orchestra gives three pairs of concerts annually, at both Caltech and Occidental College. There are also two Caltech Jazz Bands and a Concert Band, as well as an active chamber music program. For vocal music, Caltech has a mixed-voice
Glee Club A glee club is a musical group or choir group, historically of male voices but also of female or mixed voices, which traditionally specializes in the singing of short songs by trios or quartets. In the late 19th century it was very popular in ...
and the smaller Chamber Singers. The theater program at Caltech is known as TACIT, or Theater Arts at the California Institute of Technology. There are two to three plays organized by TACIT per year, and they were involved in the production of the PHD Movie, released in 2011.


Student life traditions


Annual events

Every
Halloween Halloween, or Hallowe'en (less commonly known as Allhalloween, All Hallows' Eve, or All Saints' Eve), is a celebration geography of Halloween, observed in many countries on 31 October, the eve of the Western Christianity, Western Christian f ...
, Dabney House conducts the infamous "Millikan pumpkin-drop experiment" from the top of Millikan Library, the highest point on campus. According to tradition, a claim was once made that the shattering of a pumpkin frozen in
liquid nitrogen Liquid nitrogen (LN2) is nitrogen in a liquid state at cryogenics, low temperature. Liquid nitrogen has a boiling point of about . It is produced industrially by fractional distillation of liquid air. It is a colorless, mobile liquid whose vis ...
and dropped from a sufficient height would produce a triboluminescent spark. This yearly event involves a crowd of observers, who try to spot the elusive spark. The title of the event is an oblique reference to the famous Millikan oil-drop experiment which measured ''e'', the elemental unit of electrical charge. On Ditch Day, the seniors ditch school, leaving behind elaborately designed tasks and traps at the doors of their rooms to prevent underclassmen from entering. Over the years this has evolved to the point where many seniors spend months designing mechanical, electrical, and software obstacles to confound the underclassmen. Each group of seniors designs a "stack" to be solved by a handful of underclassmen. The faculty have been drawn into the event as well, and cancel all classes on Ditch Day so the underclassmen can participate in what has become a highlight of the academic year. Another long-standing tradition is the playing of Wagner's " Ride of the Valkyries" at 7:00 each morning during finals week with the largest, loudest speakers available. The playing of that piece is not allowed at any other time (except if one happens to be listening to the entire 14 hours and 5 minutes of '' The Ring Cycle''), and any offender is dragged into the showers to be drenched in cold water fully dressed.


Pranks

Caltech students have been known for their many
prank A practical joke or prank is a trick played on people, generally causing the victim to experience embarrassment, perplexity, confusion, or discomfort.Marsh, Moira. 2015. ''Practically Joking''. Logan: Utah State University Press. The perpetrat ...
s (also known as "RFs"). The two most famous in recent history are the changing of the Hollywood Sign to read "Caltech", by judiciously covering up certain parts of the letters, and the changing of the scoreboard to read Caltech 38, MIT 9 during the 1984 Rose Bowl Game. But the most famous of all occurred during the 1961 Rose Bowl Game, where Caltech students altered the flip-cards that were raised by the stadium attendees to display "Caltech", and several other "unintended" messages. This event is now referred to as the Great Rose Bowl Hoax. In recent years, pranking has been officially encouraged by Tom Mannion, Caltech's Assistant VP for Student Affairs and Campus Life. "The grand old days of pranking have gone away at Caltech, and that's what we are trying to bring back," reported the ''Boston Globe''. In December 2011, Caltech students went to New York and pulled a prank in Manhattan's
Greenwich Village Greenwich Village, or simply the Village, is a neighborhood on the west side of Lower Manhattan in New York City, bounded by 14th Street (Manhattan), 14th Street to the north, Broadway (Manhattan), Broadway to the east, Houston Street to the s ...
. The prank involved making The Cube sculpture look like the Aperture Science Weighted Companion Cube from the video game '' Portal''. Caltech pranks have been documented in three Legends of Caltech books, the most recent of which was edited by alumni Autumn Looijen '99 and Mason Porter '98 and published in May 2007.


= Rivalry with MIT

= In 2005, a group of Caltech students pulled a string of pranks during MIT's Campus Preview Weekend for admitted students. These include covering up the word Massachusetts in the "Massachusetts Institute of Technology" engraving on the main building façade with a banner so that it read "That Other Institute of Technology". A group of MIT hackers responded by altering the banner so that the inscription read "The Only Institute of Technology." Caltech students also passed out T-shirts to MIT's incoming freshman class that had MIT written on the front and "...because not everyone can go to Caltech" along with an image of a palm tree on the back. MIT retaliated in April 2006, when students posing as the Howe & Ser (Howitzer) Moving Company stole the 130-year-old, 1.7-ton Fleming House cannon and moved it over 3,000 miles to their campus in Cambridge, Massachusetts for their 2006 Campus Preview Weekend, repeating a similar prank performed by nearby
Harvey Mudd College Harvey Mudd College (HMC) is a private liberal arts college in Claremont, California, focused on science and engineering. It is part of the Claremont Colleges, which share adjoining campus grounds and resources. The college enrolled 902 undergra ...
in 1986. Thirty members of Fleming House traveled to MIT and reclaimed their cannon on April 10, 2006. On April 13, 2007 (Friday the 13th), a group of students from ''The California Tech'', Caltech's campus newspaper, arrived and distributed fake copies of ''The Tech'', MIT's campus newspaper, while prospective students were visiting for their Campus Preview Weekend. Articles included "MIT Invents the Interweb", "Architects Deem Campus 'Unfortunate, and " Infinite Corridor Not Actually Infinite". In December 2009, some Caltech students declared that MIT had been sold and had become the Caltech East campus. A "sold" banner was hung on front of the MIT dome building and a "Welcome to Caltech East: School of the Humanities" banner over the Massachusetts Avenue Entrance. Newspapers and T-shirts were distributed, and door labels and fliers in the infinite corridor were put up in accordance with the "curriculum change." In September 2010, MIT students attempted to put a
TARDIS The TARDIS (; acronym for "Time And Relative Dimension(s) In Space") is a fictional hybrid of a time machine and spacecraft that appears in the British science fiction television series ''Doctor Who'' and its various spin-offs. While a TARDI ...
, the time machine from the BBC's ''
Doctor Who ''Doctor Who'' is a British science fiction television series broadcast by the BBC since 1963. The series, created by Sydney Newman, C. E. Webber and Donald Wilson (writer and producer), Donald Wilson, depicts the adventures of an extraterre ...
'', onto a roof. Caught in mid-act, the prank was aborted. In January 2011, Caltech students in conjunction with MIT students helped put the TARDIS on top of Baxter. Caltech students then moved the TARDIS to
UC Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a public land-grant research university in Berkeley, California, United States. Founded in 1868 and named after the Anglo-Irish philosopher George Berkele ...
Dr. Who's TARDIS Lands at MIT, Caltech, and Berkeley
, by Alessondra Springmann,
PCWorld ''PC World'' (stylized as PCWorld) is a global computer magazine published monthly by IDG. Since 2013, it has been an online-only publication. It offers advice on various aspects of PCs and related items, the Internet, and other personal te ...
, February 10, 2011
and
Stanford Leland Stanford Junior University, commonly referred to as Stanford University, is a private research university in Stanford, California, United States. It was founded in 1885 by railroad magnate Leland Stanford (the eighth governor of and th ...
. In April 2014, during MIT's Campus Preview Weekend, a group of Caltech students handed out mugs emblazoned with the MIT logo on the front and the words "The Institute of Technology" on the back. When heated, the mugs turn orange, display a palm tree, and read "Caltech The Hotter Institute of Technology." Identical mugs continue to be sold at the Caltech campus store.


Honor code

Life in the Caltech community is governed by the honor code, which simply states: "No member of the Caltech community shall take unfair advantage of any other member of the Caltech community." This is enforced by a Board of Control, which consists of undergraduate students, and by a similar body at the graduate level, called the Graduate Honor Council. The honor code aims at promoting an atmosphere of respect and trust that allows Caltech students to enjoy privileges that make for a more relaxed atmosphere. For example, the honor code allows professors to make the majority of exams as take-home, allowing students to take them on their own schedule and in their preferred environment. Through the late 1990s, the only exception to the honor code, implemented earlier in the decade in response to changes in federal regulations, concerned the sexual harassment policy. Today, there are myriad exceptions to the honor code in the form of new Institute policies such as the fire policy and alcohol policy. Although both policies are presented in the Honor System Handbook given to new members of the Caltech community, some undergraduates regard them as a slight against the honor code and the implicit trust and respect it represents within the community. In recent years, the Student Affairs Office has also taken up pursuing investigations independently of the Board of Control and Conduct Review Committee, an implicit violation of both the honor code and written disciplinary policy that has contributed to further erosion of trust between some parts of the undergraduate community and the administration.


Notable people

As of October 2024, Caltech has 48
Nobel laureates The Nobel Prizes (, ) are awarded annually by the Royal Swedish Academy of Sciences, the Swedish Academy, the Karolinska Institutet, and the Norwegian Nobel Committee to individuals and organizations who make outstanding contributions in th ...
to its name awarded to 26 alumni, 4 postdocs, and 17 non-alumni professors. The 26 alumni include five Caltech professors ( Carl D. Anderson,
Linus Pauling Linus Carl Pauling ( ; February 28, 1901August 19, 1994) was an American chemist and peace activist. He published more than 1,200 papers and books, of which about 850 dealt with scientific topics. ''New Scientist'' called him one of the 20 gre ...
, William A. Fowler, Edward B. Lewis, and Kip Thorne). Among the 17 non-alumni professors, 14 were in residence at Caltech at the time of the award;
David Baltimore David Baltimore (born March 7, 1938) is an American biologist, university administrator, and 1975 Nobel Prize in Physiology or Medicine, Nobel laureate in Physiology or Medicine. He is a professor of biology at the California Institute of Tech ...
, who shared the Prize in Physiology or Medicine in 1975, became Caltech President in 1997;
Renato Dulbecco Renato Dulbecco ( , ; February 22, 1914 – February 19, 2012) was an Italian–American virologist who won the 1975 Nobel Prize in Physiology or Medicine for his work on oncoviruses, which are viruses that can cause cancer when they infect anim ...
, who shared the Prize in Physiology or Medicine in 1975, credited his Prize to the time he had spent at Caltech; John Hopfield, who won the Prize in Physics in 2024, is the Dickinson Professor Emeritus at Caltech. The total number of Nobel Prizes is 48 because Pauling received prizes in both
Chemistry Chemistry is the scientific study of the properties and behavior of matter. It is a physical science within the natural sciences that studies the chemical elements that make up matter and chemical compound, compounds made of atoms, molecules a ...
and
Peace Peace is a state of harmony in the absence of hostility and violence, and everything that discusses achieving human welfare through justice and peaceful conditions. In a societal sense, peace is commonly used to mean a lack of conflict (suc ...
. Eight faculty and alumni have received a
Crafoord Prize The Crafoord Prize () is an annual science prize established in 1980 by Holger Crafoord, a Swedish industrialist, and his wife Anna-Greta Crafoord following a donation to the Royal Swedish Academy of Sciences. It is awarded jointly by the Acade ...
from the
Royal Swedish Academy of Sciences The Royal Swedish Academy of Sciences () is one of the Swedish Royal Academies, royal academies of Sweden. Founded on 2 June 1739, it is an independent, non-governmental scientific organization that takes special responsibility for promoting nat ...
, while 58 have been awarded the U.S.
National Medal of Science The National Medal of Science is an honor bestowed by the President of the United States to individuals in science and engineering who have made important contributions to the advancement of knowledge in the fields of behavioral science, behavior ...
, and 11 have received the
National Medal of Technology The National Medal of Technology and Innovation (formerly the National Medal of Technology) is an honor granted by the president of the United States to American inventors and innovators who have made significant contributions to the development ...
. One alumnus, Stanislav Smirnov, won the
Fields Medal The Fields Medal is a prize awarded to two, three, or four mathematicians under 40 years of age at the International Congress of Mathematicians, International Congress of the International Mathematical Union (IMU), a meeting that takes place e ...
in 2010. Other distinguished researchers have been affiliated with Caltech as postdoctoral scholars (for example,
Barbara McClintock Barbara McClintock (June 16, 1902 – September 2, 1992) was an American scientist and cytogenetics, cytogeneticist who was awarded the 1983 Nobel Prize in Physiology or Medicine. McClintock received her PhD in botany from Cornell University ...
, James D. Watson,
Sheldon Glashow Sheldon Lee Glashow (, ; born December 5, 1932) is a Nobel Prize-winning American theoretical physicist. He is the Metcalf Professor of Mathematics and Physics at Boston University, and a Eugene Higgins Professor of Physics, emeritus, at Harv ...
and John Gurdon) or visiting professors (for example,
Albert Einstein Albert Einstein (14 March 187918 April 1955) was a German-born theoretical physicist who is best known for developing the theory of relativity. Einstein also made important contributions to quantum mechanics. His mass–energy equivalence f ...
,
Stephen Hawking Stephen William Hawking (8January 194214March 2018) was an English theoretical physics, theoretical physicist, cosmologist, and author who was director of research at the Centre for Theoretical Cosmology at the University of Cambridge. Between ...
and
Edward Witten Edward Witten (born August 26, 1951) is an American theoretical physics, theoretical physicist known for his contributions to string theory, topological quantum field theory, and various areas of mathematics. He is a professor emeritus in the sc ...
).


Alumni

There are 22,930 total living alumni in the U.S. and around the world. As of October 2022, 30 alumni and 16 non-alumni faculty have won the Nobel Prize. The
Turing Award The ACM A. M. Turing Award is an annual prize given by the Association for Computing Machinery (ACM) for contributions of lasting and major technical importance to computer science. It is generally recognized as the highest distinction in the fi ...
, the "Nobel Prize of Computer Science", has been awarded to six alumni, and one has won the
Fields Medal The Fields Medal is a prize awarded to two, three, or four mathematicians under 40 years of age at the International Congress of Mathematicians, International Congress of the International Mathematical Union (IMU), a meeting that takes place e ...
. Many alumni have participated in scientific research. Some have concentrated their studies on the very small universe of atoms and molecules.
Nobel laureate The Nobel Prizes (, ) are awarded annually by the Royal Swedish Academy of Sciences, the Swedish Academy, the Karolinska Institutet, and the Norwegian Nobel Committee to individuals and organizations who make outstanding contributions in th ...
Carl D. Anderson (BS 1927, PhD 1930) proved the existence of
positron The positron or antielectron is the particle with an electric charge of +1''elementary charge, e'', a Spin (physics), spin of 1/2 (the same as the electron), and the same Electron rest mass, mass as an electron. It is the antiparticle (antimatt ...
s and
muon A muon ( ; from the Greek letter mu (μ) used to represent it) is an elementary particle similar to the electron, with an electric charge of −1 '' e'' and a spin of  ''ħ'', but with a much greater mass. It is classified as a ...
s, Nobel laureate Edwin McMillan (BS 1928, MS 1929) synthesized the first
transuranium element The transuranium (or transuranic) elements are the chemical elements with atomic number greater than 92, which is the atomic number of uranium. All of them are radioactively unstable and decay into other elements. Except for neptunium and pluton ...
, Nobel laureate Leo James Rainwater (BS 1939) investigated the non-spherical shapes of atomic nuclei, and Nobel laureate Douglas D. Osheroff (BS 1967) studied the
superfluid Superfluidity is the characteristic property of a fluid with zero viscosity which therefore flows without any loss of kinetic energy. When stirred, a superfluid forms vortex, vortices that continue to rotate indefinitely. Superfluidity occurs ...
nature of
helium-3 Helium-3 (3He see also helion) is a light, stable isotope of helium with two protons and one neutron. (In contrast, the most common isotope, helium-4, has two protons and two neutrons.) Helium-3 and hydrogen-1 are the only stable nuclides with ...
.
Donald Knuth Donald Ervin Knuth ( ; born January 10, 1938) is an American computer scientist and mathematician. He is a professor emeritus at Stanford University. He is the 1974 recipient of the ACM Turing Award, informally considered the Nobel Prize of comp ...
(PhD 1963), the "father" of the
analysis of algorithms In computer science, the analysis of algorithms is the process of finding the computational complexity of algorithms—the amount of time, storage, or other resources needed to execute them. Usually, this involves determining a function that r ...
, wrote ''
The Art of Computer Programming ''The Art of Computer Programming'' (''TAOCP'') is a comprehensive multi-volume monograph written by the computer scientist Donald Knuth presenting programming algorithms and their analysis. it consists of published volumes 1, 2, 3, 4A, and 4 ...
'' and created the
TeX Tex, TeX, TEX, may refer to: People and fictional characters * Tex (nickname), a list of people and fictional characters with the nickname * Tex Earnhardt (1930–2020), U.S. businessman * Joe Tex (1933–1982), stage name of American soul singer ...
computer typesetting system, which is commonly used in the scientific community. Bruce Reznick (BS 1973) is a mathematician noted for his contributions to
number theory Number theory is a branch of pure mathematics devoted primarily to the study of the integers and arithmetic functions. Number theorists study prime numbers as well as the properties of mathematical objects constructed from integers (for example ...
and the combinatorial-algebraic-analytic investigations of polynomials.
Narendra Karmarkar Narendra Krishna Karmarkar (born 1956) is an Indian mathematician. He developed Karmarkar's algorithm. He is listed as an ISI highly cited researcher. He invented one of the first probably polynomial time algorithms for linear programming, w ...
(MS 1979) is known for the interior point method, a polynomial algorithm for linear programming known as Karmarkar's algorithm. Other alumni have turned their gaze to the universe. C. Gordon Fullerton (BS 1957, MS 1958) piloted the third
Space Shuttle The Space Shuttle is a retired, partially reusable launch system, reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. ...
mission. Astronaut (and later,
United States Senator The United States Senate consists of 100 members, two from each of the 50 U.S. state, states. This list includes all senators serving in the 119th United States Congress. Party affiliation Independent Senators Angus King of Maine and Berni ...
)
Harrison Schmitt Harrison Hagan "Jack" Schmitt (born July 3, 1935) is an American geologist, former NASA astronaut, university professor, former U.S. senator from New Mexico. He is the most recent living person—and only person without a background in military a ...
(BS 1957) was the only geologist to have walked on the surface of the Moon. Astronomer
Eugene Merle Shoemaker Eugene Merle Shoemaker (April 28, 1928 – July 18, 1997) was an American geologist. He co-discovered Comet Shoemaker–Levy 9 with his wife Carolyn S. Shoemaker and David H. Levy. This comet hit Jupiter in July 1994: the impact was televise ...
(BS 1947, MS 1948) co-discovered Comet Shoemaker-Levy 9 (a comet which crashed into the planet
Jupiter Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined a ...
) and was the first person buried on the Moon (by having his ashes crashed into the Moon). Astronomer George O. Abell (BS 1951, MS 1952, PhD 1957) while a grad student at Caltech participated in the National Geographic Society-Palomar Sky Survey. This ultimately resulted in the publication of the ''Abell Catalogue of Clusters of Galaxies,'' the definitive work in the field. Undergraduate alumni founded, or co-founded, companies such as
LCD A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers to display information. Liquid crystals do not em ...
manufacturer Varitronix,
Hotmail Outlook.com, formerly Hotmail, is a free personal email service offered by Microsoft. It also provides a webmail interface accessible via web browser or mobile apps featuring mail, Calendaring software, calendaring, Address book, contacts, and ...
,
Compaq Compaq Computer Corporation was an American information technology, information technology company founded in 1982 that developed, sold, and supported computers and related products and services. Compaq produced some of the first IBM PC compati ...
,
MathWorks The MathWorks, Inc. is an American privately held corporation that specializes in mathematical computing software. Its major products include MATLAB and Simulink, which support data analysis and simulation. History MATLAB was created in the 1 ...
(which created
Matlab MATLAB (an abbreviation of "MATrix LABoratory") is a proprietary multi-paradigm programming language and numeric computing environment developed by MathWorks. MATLAB allows matrix manipulations, plotting of functions and data, implementat ...
), and database provider Imply, while graduate students founded, or co-founded, companies such as
Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, and Delaware General Corporation Law, incorporated in Delaware. Intel designs, manufactures, and sells computer compo ...
, TRW, and the non-profit educational organization, the
Exploratorium The Exploratorium is a museum of science museum, science, technology museum, technology, and art museum, arts in San Francisco, California. Founded by physicist and educator Frank Oppenheimer in 1969, the museum was originally located in the ...
. Arnold Beckman (PhD 1928) invented the
pH meter A pH meter is a scientific instrument that measures the hydrogen-ion activity in water-based solutions, indicating its acidity or alkalinity expressed as pH. The pH meter measures the difference in electrical potential between a pH electro ...
and commercialized it with the founding of
Beckman Instruments Beckman Coulter, Inc. is a Danaher Corporation company that develops, manufactures, and markets products relevant to biomedical testing. It operates in the industries of diagnostics under the brand name Beckman Coulter and life sciences under t ...
. His success with that company enabled him to provide seed funding for
William Shockley William Bradford Shockley ( ; February 13, 1910 – August 12, 1989) was an American solid-state physicist, electrical engineer, and inventor. He was the manager of a research group at Bell Labs that included John Bardeen and Walter Houser Brat ...
(BS 1932), who had co-invented
semiconductor A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping level ...
transistor A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch electrical signals and electric power, power. It is one of the basic building blocks of modern electronics. It is composed of semicondu ...
s and wanted to commercialize them. Shockley became the founding Director of the
Shockley Semiconductor Laboratory Shockley Semiconductor Laboratory, later known as Shockley Transistor Corporation, was a pioneering semiconductor developer founded by William Shockley, and funded by Beckman Instruments, Inc., in 1955. It was the first high technology compan ...
division of Beckman Instruments. Shockley had previously worked at
Bell Labs Nokia Bell Labs, commonly referred to as ''Bell Labs'', is an American industrial research and development company owned by Finnish technology company Nokia. With headquarters located in Murray Hill, New Jersey, Murray Hill, New Jersey, the compa ...
, whose first president was another alumnus, Frank Jewett (BS 1898). Because his aging mother lived in
Palo Alto, California Palo Alto ( ; Spanish language, Spanish for ) is a charter city in northwestern Santa Clara County, California, United States, in the San Francisco Bay Area, named after a Sequoia sempervirens, coastal redwood tree known as El Palo Alto. Th ...
, Shockley established his laboratory near her in
Mountain View, California Mountain View is a city in Santa Clara County, California, United States, part of the San Francisco Bay Area. Named for its views of the Santa Cruz Mountains, the population was 82,376 at the 2020 United States census, 2020 census. Mountain V ...
. Shockley was a co-recipient of the
Nobel Prize in Physics The Nobel Prize in Physics () is an annual award given by the Royal Swedish Academy of Sciences for those who have made the most outstanding contributions to mankind in the field of physics. It is one of the five Nobel Prizes established by the ...
in 1956, but his aggressive management style and odd personality at the Shockley Lab became unbearable. In late 1957, eight of his researchers resigned and with support from Sherman Fairchild formed
Fairchild Semiconductor Fairchild Semiconductor International, Inc. was an American semiconductor company based in San Jose, California. It was founded in 1957 as a division of Fairchild Camera and Instrument by the " traitorous eight" who defected from Shockley Semi ...
. Among the " traitorous eight" was Gordon E. Moore (PhD 1954), who later left Fairchild to co-found
Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, and Delaware General Corporation Law, incorporated in Delaware. Intel designs, manufactures, and sells computer compo ...
. Other offspring companies of Fairchild Semiconductor include
National Semiconductor National Semiconductor Corporation was an United States of America, American Semiconductor manufacturing, semiconductor manufacturer, which specialized in analogue electronics, analog devices and subsystems, formerly headquartered in Santa Clara, ...
and
Advanced Micro Devices Advanced Micro Devices, Inc. (AMD) is an American multinational corporation and technology company headquartered in Santa Clara, California and maintains significant operations in Austin, Texas. AMD is a Information technology, hardware and F ...
, which in turn spawned more technology companies in the area. Shockley's decision to use
silicon Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid (sometimes considered a non-metal) and semiconductor. It is a membe ...
instead of
germanium Germanium is a chemical element; it has Symbol (chemistry), symbol Ge and atomic number 32. It is lustrous, hard-brittle, grayish-white and similar in appearance to silicon. It is a metalloid or a nonmetal in the carbon group that is chemically ...
as the
semiconductor A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping level ...
material, coupled with the abundance of silicon semiconductor related companies in the area, gave rise to the term "
Silicon Valley Silicon Valley is a region in Northern California that is a global center for high technology and innovation. Located in the southern part of the San Francisco Bay Area, it corresponds roughly to the geographical area of the Santa Clara Valley ...
" to describe that geographic region surrounding Palo Alto. Caltech alumni also held public offices, with Mustafa A. G. Abushagur (PhD 1984) the Deputy Prime Minister of
Libya Libya, officially the State of Libya, is a country in the Maghreb region of North Africa. It borders the Mediterranean Sea to the north, Egypt to Egypt–Libya border, the east, Sudan to Libya–Sudan border, the southeast, Chad to Chad–L ...
and Prime Minister-Elect of
Libya Libya, officially the State of Libya, is a country in the Maghreb region of North Africa. It borders the Mediterranean Sea to the north, Egypt to Egypt–Libya border, the east, Sudan to Libya–Sudan border, the southeast, Chad to Chad–L ...
, James Fletcher (PhD 1948) the 4th and 7th
Administrator of NASA The administrator of the National Aeronautics and Space Administration is the highest-ranking official of NASA, the national List of space agencies, space agency of the United States. The administrator is NASA's chief decision maker, responsible ...
, Steven Koonin (PhD 1972) the Undersecretary of Energy for Science, and Regina Dugan (PhD 1993) the 19th director of
DARPA The Defense Advanced Research Projects Agency (DARPA) is a research and development agency of the United States Department of Defense responsible for the development of emerging technologies for use by the military. Originally known as the Adva ...
. The 20th director for DARPA, Arati Prabhakar, is also a Caltech alumna (PhD 1984) as well as
Charles Elachi Charles Elachi (born April 18, 1947
. ''Cedars Network''. Retrieved on February 20, 2008.
) is a ...
(Phd 1971), former director of the Jet Propulsion Lab. Arvind Virmani is a former
Chief Economic Adviser to the Government of India The Chief Economic Adviser to the Government of India (CEA) advises the government on economic matters and is responsible for the preparation of the Economic survey of India tabled in Parliament of India, Parliament before the Union budget of I ...
. In 2013, President
Barack Obama Barack Hussein Obama II (born August 4, 1961) is an American politician who was the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, he was the first African American president in American history. O ...
announced the nomination of France Cordova (PhD 1979) as the director of the
National Science Foundation The U.S. National Science Foundation (NSF) is an Independent agencies of the United States government#Examples of independent agencies, independent agency of the Federal government of the United States, United States federal government that su ...
and Ellen Williams (PhD 1982) as the director for
ARPA-E ARPA-E, or Advanced Research Projects Agency–Energy is an agency within the United States Department of Energy tasked with funding the research and development of advanced energy technologies. The goal of the agency is to improve U.S. economic ...
. File:William Shockley, Stanford University.jpg, Nobel laureate
William Shockley William Bradford Shockley ( ; February 13, 1910 – August 12, 1989) was an American solid-state physicist, electrical engineer, and inventor. He was the manager of a research group at Bell Labs that included John Bardeen and Walter Houser Brat ...
, BS 1932, co-inventor of the solid state
transistor A transistor is a semiconductor device used to Electronic amplifier, amplify or electronic switch, switch electrical signals and electric power, power. It is one of the basic building blocks of modern electronics. It is composed of semicondu ...
, father of
Silicon Valley Silicon Valley is a region in Northern California that is a global center for high technology and innovation. Located in the southern part of the San Francisco Bay Area, it corresponds roughly to the geographical area of the Santa Clara Valley ...
File:Tsien Hsue-shen.jpg,
Qian Xuesen Qian Xuesen ( zh, s=钱学森; December 11, 1911October 31, 2009; also spelled as Tsien Hsue-shen) was a Chinese aerospace engineer and cyberneticist who made significant contributions to the field of aerodynamics and established engineering ...
, PhD 1939, co-founder of JPL, "Father" of Chinese rocketry File:John McCarthy Stanford.jpg, Turing Award laureate John McCarthy, BS 1948, inventor of the
Lisp Lisp (historically LISP, an abbreviation of "list processing") is a family of programming languages with a long history and a distinctive, fully parenthesized Polish notation#Explanation, prefix notation. Originally specified in the late 1950s, ...
programming language File:Benoit Mandelbrot mg 1804b.jpg,
Benoit Mandelbrot Benoit B. Mandelbrot (20 November 1924 – 14 October 2010) was a Polish-born French-American mathematician and polymath with broad interests in the practical sciences, especially regarding what he labeled as "the art of roughness" of phy ...
, MS 1948, Engineering 1949, father of fractal geometry, namesake of the
Mandelbrot set The Mandelbrot set () is a two-dimensional set (mathematics), set that is defined in the complex plane as the complex numbers c for which the function f_c(z)=z^2+c does not Stability theory, diverge to infinity when Iteration, iterated starting ...
File:Gordon Moore.jpg,
Gordon Moore Gordon Earle Moore (January 3, 1929 – March 24, 2023) was an American businessman, engineer, and the co-founder and emeritus chairman of Intel Corporation. He proposed Moore's law which makes the observation that the number of transistors i ...
, PhD 1954, co-founder of
Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, and Delaware General Corporation Law, incorporated in Delaware. Intel designs, manufactures, and sells computer compo ...
, coined the observation
Moore's Law Moore's law is the observation that the Transistor count, number of transistors in an integrated circuit (IC) doubles about every two years. Moore's law is an observation and Forecasting, projection of a historical trend. Rather than a law of ...
File:Gordon Fullerton 1989.jpg, Astronaut C. Gordon Fullerton, BS 1957, MS 1958 File:Harrison H. Schmitt.jpg, Astronaut and
United States Senator The United States Senate consists of 100 members, two from each of the 50 U.S. state, states. This list includes all senators serving in the 119th United States Congress. Party affiliation Independent Senators Angus King of Maine and Berni ...
Harrison Schmitt Harrison Hagan "Jack" Schmitt (born July 3, 1935) is an American geologist, former NASA astronaut, university professor, former U.S. senator from New Mexico. He is the most recent living person—and only person without a background in military a ...
, BS 1957, the only geologist to have walked on the Moon File:Kip Thorne at Caltech.jpg, Nobel laureate Kip Thorne, BS 1962, known for his prolific contributions in gravitation physics and astrophysics and co-founding of
LIGO The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a large-scale physics experiment and observatory designed to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool. Prior to LIG ...
File:KnuthAtOpenContentAlliance.jpg, Turing Award laureate
Donald Knuth Donald Ervin Knuth ( ; born January 10, 1938) is an American computer scientist and mathematician. He is a professor emeritus at Stanford University. He is the 1974 recipient of the ACM Turing Award, informally considered the Nobel Prize of comp ...
, PhD 1963, "father" of the analysis of algorithms, creator of
TeX Tex, TeX, TEX, may refer to: People and fictional characters * Tex (nickname), a list of people and fictional characters with the nickname * Tex Earnhardt (1930–2020), U.S. businessman * Joe Tex (1933–1982), stage name of American soul singer ...
typesetting system File:Mark S. Wrighton.jpg,
Mark S. Wrighton Mark Stephen Wrighton (born June 11, 1949) is an American academic and chemist. From 1995 to 2019, he served as the List of chancellors of Washington University in St. Louis, 14th Chancellor of Washington University in St. Louis, where he overs ...
, PhD 1972, Chancellor of Washington University in St. Louis and President of
George Washington University The George Washington University (GW or GWU) is a Private university, private University charter#Federal, federally-chartered research university in Washington, D.C., United States. Originally named Columbian College, it was chartered in 1821 by ...
File:France A. Córdova official photo.jpg, France A. Córdova, PhD 1978, Astrophysicist and 14th Director of the
National Science Foundation The U.S. National Science Foundation (NSF) is an Independent agencies of the United States government#Examples of independent agencies, independent agency of the Federal government of the United States, United States federal government that su ...
File:Stephen Wolfram PR.jpg,
Stephen Wolfram Stephen Wolfram ( ; born 29 August 1959) is a British-American computer scientist, physicist, and businessman. He is known for his work in computer algebra and theoretical physics. In 2012, he was named a fellow of the American Mathematical So ...
, PhD 1979, creator of
Mathematica Wolfram (previously known as Mathematica and Wolfram Mathematica) is a software system with built-in libraries for several areas of technical computing that allows machine learning, statistics, symbolic computation, data manipulation, network ...
and
Wolfram Alpha WolframAlpha ( ) is an answer engine developed by Wolfram Research. It is offered as an online service that answers factual queries by computing answers from externally sourced data. History Launch preparations for WolframAlpha began on Ma ...
; one of the first
MacArthur Fellows The MacArthur Fellows Program, also known as the MacArthur Fellowship and colloquially called the "Genius Grant", is a prize awarded annually by the MacArthur Foundation, John D. and Catherine T. MacArthur Foundation to typically between 20 and ...
in 1981 File:Carolyn Porco 01.jpg, Carolyn Porco, PhD 1983, planetary scientist who led the imaging team on the '' Cassini'' mission in orbit around Saturn File:Andrea Ghez (cropped).jpg, Andrea M. Ghez, PHD 1992
Nobel Prize in Physics The Nobel Prize in Physics () is an annual award given by the Royal Swedish Academy of Sciences for those who have made the most outstanding contributions to mankind in the field of physics. It is one of the five Nobel Prizes established by the ...
recipient and professor at
University of California, Los Angeles The University of California, Los Angeles (UCLA) is a public university, public Land-grant university, land-grant research university in Los Angeles, California, United States. Its academic roots were established in 1881 as a normal school the ...
File:Robertbehnkenv2.jpg, Bob Behnken, MS, 1993; PhD, 1997, Former NASA Astronaut and Chief of theAstronaut Office File:Adam D'Angelo - The Grove 2022.jpg,
Adam D'Angelo Adam D'Angelo (born August 14, 1984) is an American internet entrepreneur. He is best known for his role as the co-founder and CEO of Quora, based in Mountain View, California, and as the first Chief Technology Officer of Facebook (now Meta). ...
, BS 2006, Founder of
Quora Quora is an American social question-and-answer website and online knowledge market headquartered in Mountain View, California. It was founded on June 25, 2009, and made available to the public on June 21, 2010. Users can post questions, answ ...


Faculty and staff

Richard Feynman Richard Phillips Feynman (; May 11, 1918 – February 15, 1988) was an American theoretical physicist. He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of t ...
was among the most well-known physicists associated with Caltech, having published the '' Feynman Lectures on Physics'', an undergraduate physics text, and popular science texts such as '' Six Easy Pieces'' for the general audience. The promotion of physics made him a public figure of science, although his Nobel-winning work in
quantum electrodynamics In particle physics, quantum electrodynamics (QED) is the Theory of relativity, relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quant ...
was already very established in the scientific community.
Murray Gell-Mann Murray Gell-Mann (; September 15, 1929 – May 24, 2019) was an American theoretical physicist who played a preeminent role in the development of the theory of elementary particles. Gell-Mann introduced the concept of quarks as the funda ...
, a Nobel-winning physicist, introduced a classification of
hadron In particle physics, a hadron is a composite subatomic particle made of two or more quarks held together by the strong nuclear force. Pronounced , the name is derived . They are analogous to molecules, which are held together by the electri ...
s and went on to postulate the existence of
quark A quark () is a type of elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nucleus, atomic nuclei ...
s, which is currently accepted as part of the
Standard Model The Standard Model of particle physics is the Scientific theory, theory describing three of the four known fundamental forces (electromagnetism, electromagnetic, weak interaction, weak and strong interactions – excluding gravity) in the unive ...
. Long-time Caltech President
Robert Andrews Millikan Robert Andrews Millikan ( ; March 22, 1868 – December 19, 1953) was an American physicist who received the Nobel Prize in Physics in 1923 "for his work on the elementary charge of electricity and on the photoelectric effect". Millikan gradua ...
was the first to calculate the charge of the
electron The electron (, or in nuclear reactions) is a subatomic particle with a negative one elementary charge, elementary electric charge. It is a fundamental particle that comprises the ordinary matter that makes up the universe, along with up qua ...
with his well-known oil-drop experiment, while Richard Chace Tolman is remembered for his contributions to
cosmology Cosmology () is a branch of physics and metaphysics dealing with the nature of the universe, the cosmos. The term ''cosmology'' was first used in English in 1656 in Thomas Blount's ''Glossographia'', with the meaning of "a speaking of the wo ...
and
statistical mechanics In physics, statistical mechanics is a mathematical framework that applies statistical methods and probability theory to large assemblies of microscopic entities. Sometimes called statistical physics or statistical thermodynamics, its applicati ...
. 2004
Nobel Prize in Physics The Nobel Prize in Physics () is an annual award given by the Royal Swedish Academy of Sciences for those who have made the most outstanding contributions to mankind in the field of physics. It is one of the five Nobel Prizes established by the ...
winner H. David Politzer is a current professor at Caltech, as is astrophysicist and author Kip Thorne and eminent mathematician
Barry Simon Barry Martin Simon (born 16 April 1946) is an American mathematical physicist and was the IBM professor of Mathematics and Theoretical Physics at Caltech, known for his prolific contributions in spectral theory, functional analysis, and nonr ...
.
Linus Pauling Linus Carl Pauling ( ; February 28, 1901August 19, 1994) was an American chemist and peace activist. He published more than 1,200 papers and books, of which about 850 dealt with scientific topics. ''New Scientist'' called him one of the 20 gre ...
pioneered
quantum chemistry Quantum chemistry, also called molecular quantum mechanics, is a branch of physical chemistry focused on the application of quantum mechanics to chemical systems, particularly towards the quantum-mechanical calculation of electronic contributions ...
and
molecular biology Molecular biology is a branch of biology that seeks to understand the molecule, molecular basis of biological activity in and between Cell (biology), cells, including biomolecule, biomolecular synthesis, modification, mechanisms, and interactio ...
, and went on to discover the nature of the chemical bond in 1939. Seismologist Charles Richter, also an alumnus, developed the magnitude scale that bears his name, the
Richter magnitude scale The Richter scale (), also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, is a measure of the strength of earthquakes, developed by Charles Richter in collaboration with Beno Gutenberg, and pr ...
for measuring the power of earthquakes. One of the founders of the geochemistry department, Clair Patterson was the first to accurately determine the age of the Earth via lead:uranium ratio in meteorites. In engineering, Theodore von Kármán made many key advances in aerodynamics, notably his work on
supersonic Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately . Speeds greater than five times ...
and
hypersonic In aerodynamics, a hypersonic speed is one that exceeds five times the speed of sound, often stated as starting at speeds of Mach 5 and above. The precise Mach number at which a craft can be said to be flying at hypersonic speed varies, since i ...
airflow characterization. A repeating pattern of swirling
vortices In fluid dynamics, a vortex (: vortices or vortexes) is a region in a fluid in which the flow revolves around an axis line, which may be straight or curved. Vortices form in stirred fluids, and may be observed in smoke rings, whirlpools in th ...
is named after him, the von Kármán vortex street. Participants in von Kármán's GALCIT project included Frank Malina, who helped develop the
WAC Corporal The WAC Corporal was the first operational sounding rocket developed in the United States. It was an offshoot of the Corporal program, that was started by a partnership between the United States Army Ordnance Corps and the California Institut ...
, which was the first U.S. rocket to reach the edge of space, Jack Parsons, a pioneer in the development of liquid and solid rocket fuels who designed the first castable composite-based rocket motor, and
Qian Xuesen Qian Xuesen ( zh, s=钱学森; December 11, 1911October 31, 2009; also spelled as Tsien Hsue-shen) was a Chinese aerospace engineer and cyberneticist who made significant contributions to the field of aerodynamics and established engineering ...
, who was dubbed the "Father of Chinese Rocketry". More recently, Michael Brown, a professor of planetary astronomy, discovered many
trans-Neptunian object A trans-Neptunian object (TNO), also written transneptunian object, is any minor planet in the Solar System that orbits the Sun at a greater average distance than Neptune, which has an orbital semi-major axis of 30.1 astronomical units (AU). ...
s, most notably the
dwarf planet A dwarf planet is a small planetary-mass object that is in direct orbit around the Sun, massive enough to be hydrostatic equilibrium, gravitationally rounded, but insufficient to achieve clearing the neighbourhood, orbital dominance like the ...
Eris, which prompted the
International Astronomical Union The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and developmen ...
to redefine the term "
planet A planet is a large, Hydrostatic equilibrium, rounded Astronomical object, astronomical body that is generally required to be in orbit around a star, stellar remnant, or brown dwarf, and is not one itself. The Solar System has eight planets b ...
".
David Baltimore David Baltimore (born March 7, 1938) is an American biologist, university administrator, and 1975 Nobel Prize in Physiology or Medicine, Nobel laureate in Physiology or Medicine. He is a professor of biology at the California Institute of Tech ...
, the Robert A. Millikan Professor of Biology, and Alice Huang, Senior Faculty Associate in Biology, served as the presidents of AAAS from 2007 to 2008 and 2010 to 2011, respectively. 33% of the faculty are members of the
National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, NGO, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the ...
or
Engineering Engineering is the practice of using natural science, mathematics, and the engineering design process to Problem solving#Engineering, solve problems within technology, increase efficiency and productivity, and improve Systems engineering, s ...
and/or fellows of the
American Academy of Arts and Sciences The American Academy of Arts and Sciences (The Academy) is one of the oldest learned societies in the United States. It was founded in 1780 during the American Revolution by John Adams, John Hancock, James Bowdoin, Andrew Oliver, and other ...
. This is the highest percentage of any faculty in the country with the exception of the graduate institution
Rockefeller University The Rockefeller University is a Private university, private Medical research, biomedical Research university, research and graduate-only university in New York City, New York. It focuses primarily on the biological and medical sciences and pro ...
. The average salary for assistant professors at Caltech is $111,300, associate professors $121,300, and full professors $172,800. Caltech faculty are active in applied physics, astronomy and astrophysics, biology, biochemistry, biological engineering, chemical engineering, computer science, geology, mechanical engineering, and physics.


Presidents

The following persons have led Caltech since 1921: Table notes:


Caltech startups

Over the years Caltech has actively promoted the commercialization of technologies developed within its walls. Through its Office of Technology Transfer & Corporate Partnerships, scientific breakthroughs have led to the transfer of numerous technologies in a wide variety of scientific-related fields such as
photovoltaic Photovoltaics (PV) is the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry. The photovoltaic effect is commercially ...
,
radio-frequency identification Radio-frequency identification (RFID) uses electromagnetic fields to automatically Automatic identification system, identify and Tracking system, track tags attached to objects. An RFID system consists of a tiny radio transponder called a tag, ...
(RFID),
semiconductor A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping level ...
s,
hyperspectral imaging Hyperspectral imaging collects and processes information from across the electromagnetic spectrum. The goal of hyperspectral imaging is to obtain the spectrum for each pixel in the image of a scene, with the purpose of finding objects, identifyi ...
,
electronic devices Electronics is a scientific and engineering discipline that studies and applies the principles of physics to design, create, and operate devices that manipulate electrons and other electrically charged particles. It is a subfield of physics and ...
,
protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residue (biochemistry), residues. Proteins perform a vast array of functions within organisms, including Enzyme catalysis, catalysing metab ...
design, solid state amplifiers and many more. Companies such as
Quora Quora is an American social question-and-answer website and online knowledge market headquartered in Mountain View, California. It was founded on June 25, 2009, and made available to the public on June 21, 2010. Users can post questions, answ ...
, Contour Energy Systems, Impinj, Fulcrum Microsystems, Nanosys, Inc., Photon etc., Xencor, and Wavestream Wireless have emerged from Caltech.


In media and popular culture

Caltech has appeared in many works of popular culture, both as itself and in disguised form. On television, it played a prominent role and was the workplace of all four male lead characters and one female lead character in the sitcom ''
The Big Bang Theory ''The Big Bang Theory'' is an American television sitcom created by Chuck Lorre and Bill Prady for CBS. It aired from September 24, 2007, to May 16, 2019, running for 12 seasons and 279 episodes. The show originally centered on five charact ...
''. Caltech is also the inspiration, and frequent film location, for the California Institute of Science in ''
Numb3rs ''Numbers'' (stylized as ''NUMB3RS'') is an American crime drama television series that originally aired on CBS from January 23, 2005, to March 12, 2010, with a total of six seasons consisting of 118 episodes. The series was created by Nico ...
''.Caltech References in "Real Genius"
. Retrieved 2007-11-19.
On film, the Pacific Tech of ''
The War of the Worlds ''The War of the Worlds'' is a science fiction novel by English author H. G. Wells. It was written between 1895 and 1897, and serialised in '' Pearson's Magazine'' in the UK and ''Cosmopolitan'' magazine in the US in 1897. The full novel was ...
''Cowan, Douglas E.
Intellects vast and cool and unsympathetic: Science, Religion, and ''The War of the Worlds''
." ''Journal of Religion and Film'', Vol. 11, No. 1, April 1, 2007.
and ''
Real Genius ''Real Genius'' is a 1985 American science fiction comedy film directed by Martha Coolidge, written by Neal Israel, Pat Proft, and PJ Torokvei, and starring Val Kilmer and Gabriel Jarret. The film, set on the campus of Pacific Tech, a scie ...
'' is based on Caltech. In nonfiction, two 2007 documentaries examine aspects of Caltech: ''Curious'', its researchers, and '' Quantum Hoops'', its men's basketball team. Caltech is also prominently featured in many comics and television series by
Marvel Entertainment Marvel Entertainment, LLC (formerly Marvel Entertainment, Inc. and Marvel Enterprises, Inc.) was an American entertainment company founded in June 1998 and based in New York City, formed by the merger of #Marvel Entertainment Group, Marvel Ente ...
. In
Marvel Comics Marvel Comics is a New York City–based comic book publishing, publisher, a property of the Walt Disney Company since December 31, 2009, and a subsidiary of Disney Publishing Worldwide since March 2023. Marvel was founded in 1939 by Martin G ...
, the university serves as the alma mater of
Hulk The Hulk is a superhero appearing in American comic books published by Marvel Comics. Created by writer Stan Lee and artist Jack Kirby, the character first appeared in the debut issue of ''The Incredible Hulk (comic book), The Incredible Hulk ...
, Mister Fantastic, Bill Foster (character), Bill Foster (Black Goliath), and Madman (Marvel Comics), Madman. In the Marvel Cinematic Universe, Bruno Carrelli (Kamala Khan's best friend and love interest) attends Caltech in the miniseries ''Ms. Marvel (miniseries), Ms. Marvel''. Given its Los Angeles-area location, the grounds of the Institute are often host to short scenes in movies and television. The Athenaeum at Caltech, Athenaeum dining club appears in the Beverly Hills Cop (film series), ''Beverly Hills Cop'' series, ''The X-Files (film), The X-Files'', ''True Romance'', and ''The West Wing''.


See also

* Engineering education * US-China University Presidents Roundtable


Notes


References


External links

*
Athletics website
{{authority control California Institute of Technology, 1891 establishments in California Buildings and structures in Pasadena, California Education in Pasadena, California Engineering universities and colleges in California Private universities and colleges in California San Gabriel Valley Schools accredited by the Western Association of Schools and Colleges Science and technology in Greater Los Angeles Technological universities in the United States Universities and colleges in Los Angeles County, California Need-blind educational institutions Universities and colleges established in 1891