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Cenote Sagrado
The Sacred Cenote ( es, cenote sagrado, , "sacred well"; alternatively known as the "Well of Sacrifice") is a water-filled sinkhole in limestone at the pre-Columbian Maya archaeological site of Chichen Itza, in the northern Yucatán Peninsula. It is located to the north of Chichen Itza's civic precinct, to which it is connected by a ''sacbe'', a raised pathway. According to both Maya and Spanish post-Conquest sources, pre-Columbian Maya deposited valuables and human bodies into the cenote as a form of sacrifice to the rain god Chaac. Edward Herbert Thompson dredged the Cenote Sagrado from 1904 to 1910, and recovered artifacts of gold, jade, pottery, and incense, as well as human remains. Beginning in the 1950s several Mexican-driven projects were conducted in the cenote, including a 1961 project that used an airlift dredge. Description and history The northwestern Yucatán Peninsula is a limestone plain, with no rivers or streams, lakes or ponds. The region is pockmarked w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cenote Xtoloc En Chichén Itzá
A cenote ( or ; ) is a natural pit, or sinkhole, resulting from the collapse of limestone bedrock that exposes groundwater. The regional term is specifically associated with the Yucatán Peninsula of Mexico, where cenotes were commonly used for water supplies by the ancient Maya, and occasionally for sacrificial offerings. The term derives from a word used by the lowland Yucatec Maya——to refer to any location with accessible groundwater. Similar rock-sided sinkholes like cenotes are common geological forms in low-altitude regions, particularly on islands, coastlines, and platforms with young post-Paleozoic limestone with little soil development. The term ''cenote'' has also been used to describe similar karst features in other countries such as Cuba and Australia. Definition and description Cenotes are surface connections to subterranean water bodies. While the best-known cenotes are large open-water pools measuring tens of meters in diameter, such as those at Chichen It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geographic
''National Geographic'' (formerly the ''National Geographic Magazine'', sometimes branded as NAT GEO) is a popular American monthly magazine published by National Geographic Partners. Known for its photojournalism, it is one of the most widely read magazines of all time. The magazine was founded in 1888 as a scholarly journal, nine months after the establishment of the society, but is now a popular magazine. In 1905, it began including pictures, a style for which it became well-known. Its first color photos appeared in the 1910s. During the Cold War, the magazine committed itself to present a balanced view of the physical and human geography of countries beyond the Iron Curtain. Later, the magazine became outspoken on environmental issues. Since 2019, controlling interest has been held by The Walt Disney Company. Topics of features generally concern geography, history, nature, science, and world culture. The magazine is well known for its distinctive appearance: a thick squa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Obsidian
Obsidian () is a naturally occurring volcanic glass formed when lava extrusive rock, extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolite, rhyolitic lava flows known as obsidian flows. These flows have a high content of silicon dioxide, silica, granting them a high viscosity. The high viscosity inhibits atomic diffusion, diffusion of atoms through the lava, which inhibits the first step (nucleation) in the formation of mineral crystals. Together with rapid cooling, this results in a natural glass forming from the lava. Obsidian is hard, Brittleness, brittle, and amorphous; it therefore Fracture (mineralogy)#Conchoidal fracture, fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as surgic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chert
Chert () is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). Chert is characteristically of biological origin, but may also occur inorganically as a precipitation (chemistry), chemical precipitate or a diagenesis, diagenetic replacement, as in petrified wood. Chert is typically composed of the petrified remains of siliceous ooze, the biogenic sediment that covers large areas of the deep ocean floor, and which contains the silicon skeletal remains of diatoms, Dictyochales, silicoflagellates, and radiolarians. Precambrian cherts are notable for the presence of fossil cyanobacteria. In addition to Micropaleontology, microfossils, chert occasionally contains macrofossils. However, some chert is devoid of any fossils. Chert varies greatly in color (from white to black), but most often manifests as gray, brown, grayish brown and light green to rusty redW.L. Roberts, T.J. Campbell, G.R. Rapp Jr. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Club De Exploraciones Y Deportes Acauticos De Mexico
Club may refer to: Arts, entertainment, and media * ''Club'' (magazine) * Club, a ''Yie Ar Kung-Fu'' character * Clubs (suit), a suit of playing cards * Club music * "Club", by Kelsea Ballerini from the album ''kelsea'' Brands and enterprises * Club (cigarette), a Scottish brand of cigarettes * Club (German cigarette), a German brand of cigarettes * Club Med, a holiday company Food * Club (soft drink) * Club Crackers * Club sandwich * Club (biscuit), a brand of biscuits manufactured by Jacob's (Ireland) and McVitie's (UK) Objects * Club (weapon), a blunt-force weapon * Golf club * Indian club, an exercise device * Juggling club * Throwing club, an item of sport equipment used in the club throw * Throwing club, an alternative name for a throwing stick Organizations * Club (organization), a type of association * Book discussion club, also called a book club or reading circle * Book sales club, a marketing mechanism * Cabaret club * Gentlemen's club (traditional) * Health club ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geographic Society
The National Geographic Society (NGS), headquartered in Washington, D.C., United States, is one of the largest non-profit scientific and educational organizations in the world. Founded in 1888, its interests include geography, archaeology, and natural science, the promotion of environmental and historical conservation, and the study of world culture and history. The National Geographic Society's logo is a yellow portrait frame—rectangular in shape—which appears on the margins surrounding the front covers of its magazines and as its television channel logo. Through National Geographic Partners (a joint venture with The Walt Disney Company), the Society operates the magazine, TV channels, a website, worldwide events, and other media operations. Overview The National Geographic Society was founded on 13 January 1888 "to increase and diffuse geographic knowledge". It is governed by a board of trustees whose 33 members include distinguished educators, business executives, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Bahamas
The Bahamas (), officially the Commonwealth of The Bahamas, is an island country within the Lucayan Archipelago of the West Indies in the Atlantic Ocean, North Atlantic. It takes up 97% of the Lucayan Archipelago's land area and is home to 88% of the archipelago's population. The archipelagic state consists of more than 3,000 islands, cays, and islets in the Atlantic Ocean, and is located north of Cuba and northwest of the island of Hispaniola (split between the Dominican Republic and Haiti) and the Turks and Caicos Islands, southeast of the U.S. state of Florida, and east of the Florida Keys. The capital is Nassau, Bahamas, Nassau on the island of New Providence. The Royal Bahamas Defence Force describes The Bahamas' territory as encompassing of ocean space. The Bahama Islands were inhabited by the Lucayan people, Lucayans, a branch of the Arawakan-Taino language, speaking Taíno, for many centuries. Christopher Columbus was the first European to see the islands, making hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexican Revolution
The Mexican Revolution ( es, Revolución Mexicana) was an extended sequence of armed regional conflicts in Mexico from approximately 1910 to 1920. It has been called "the defining event of modern Mexican history". It resulted in the destruction of the Federal Army and its replacement by a revolutionary army, and the transformation of Mexican culture and Federal government of Mexico, government. The northern Constitutionalists in the Mexican Revolution, Constitutionalist faction prevailed on the battlefield and drafted the present-day Constitution of Mexico, which aimed to create a strong central government. Revolutionary generals held power from 1920 to 1940. The revolutionary conflict was primarily a civil war, but foreign powers, having important economic and strategic interests in Mexico, figured in the outcome of Mexico's power struggles. The United States involvement in the Mexican Revolution, United States played an especially significant role. Although the decades-long r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard University
Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of higher learning in the United States and one of the most prestigious and highly ranked universities in the world. The university is composed of ten academic faculties plus Harvard Radcliffe Institute. The Faculty of Arts and Sciences offers study in a wide range of undergraduate and graduate academic disciplines, and other faculties offer only graduate degrees, including professional degrees. Harvard has three main campuses: the Cambridge campus centered on Harvard Yard; an adjoining campus immediately across Charles River in the Allston neighborhood of Boston; and the medical campus in Boston's Longwood Medical Area. Harvard's endowment is valued at $50.9 billion, making it the wealthiest academic institution in the world. Endowment inco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peabody Museum Of Archaeology And Ethnology
The Peabody Museum of Archaeology and Ethnology is a museum affiliated with Harvard University in Cambridge, Massachusetts. Founded in 1866, the Peabody Museum is one of the oldest and largest museums focusing on anthropological material, with particular focus on the ethnography and archaeology of the Americas. The museum is caretaker to over 1.2 million objects, some of documents, 2,000 maps and site plans, and approximately 500,000 photographs. The museum is located at Divinity Avenue on the Harvard University campus. The museum is one of the four Harvard Museums of Science and Culture open to the public. History The museum was established through an October 8, 1866 gift from wealthy American financier and philanthropist George Peabody, a native of South Danvers (now eponymously named Peabody, Massachusetts). Peabody committed $150,000 to be used, according to the terms of the trust, to establish the position of Peabody Professor-Curator, to purchase artifacts, and to constr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stephen Salisbury III
Stephen Salisbury III (1835–1905), also referred to as Stephen Salisbury Jr., was an American businessman, lawyer, and politician. The son of a wealthy landowner, Salisbury helped manage the family's extensive properties and businesses in Worcester County, Massachusetts. Like his father, Salisbury served in the State Senate, was president of the Worcester National Bank, and directed the Worcester & Nashua Railroad. He was a trustee of the Worcester City Hospital and the Worcester Polytechnic Institute. Biography Stephen Salisbury III was born in Worcester on March 31, 1835. He graduated from Harvard College in 1856, and studied abroad for two years at Friedrich Wilhelm University. He received a degree from Harvard Law School in 1861, and was admitted to the bar that October. Like his father, he maintained a long association with the American Antiquarian Society. He was elected a member in 1863, served on its board of councilors from 1847 to 1884, as vice-president from 1884 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
