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Herto Man
Herto Man refers to the 154,000 - 160,000-year-old human remains (''Homo sapiens'') discovered in 1997 from the Upper Herto member of the Bouri Formation in the Afar Triangle, Ethiopia. The discovery of Herto Man was especially significant at the time, as it fell within a long gap in the fossil record between 300 and 100 thousand years ago, and at its description in 2003, it represented the oldest dated ''H. sapiens'' remains. In the original description paper, these 12 (at minimum) individuals were described as falling just outside the umbrella of "anatomically modern human". Thus, Herto Man was classified into a new subspecies as "''H. s. idaltu''" ( aa, Idaltu "elder"). It supposedly represented a transitional morph between the more archaic "'' H. (s.?) rhodesiensis'' and ''H. s. sapiens'' (that is, a stage in a chronospecies). Subsequent researchers have rejected this classification. The validity of such subspecies is difficult to justify because of the vague definitions of "sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bouri Formation
The Bouri Formation is a sequence of sedimentary deposits that is the source of australopithecine and Homo (that is, hominin) fossils, artifacts, and bones of large mammals with cut marks from butchery with tools by early hominins. It is located in the Middle Awash Valley, in Ethiopia, East Africa, and is a part of the Afar Depression that has provided rich human fossil sites such as Gona and Hadar. The Bouri Formation stretches down much of the length and breadth of the Bouri "peninsula", which projects across the dry bed of the Afar Depression. The Formation is sufficiently eroded to expose three geological members or layers: the Hatayae, the Dakanihylo, and the Herto. Human remains with signs of having been prepared for burial have been found in the Upper Herto layers. Geology The Bouri "peninsula" is a geological fault-raised horst that diverts the Awash River, forming a partial dam and creating Lake Yardi; and it contains the Bouri Formation. The peninsula is about ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parietal Bone
The parietal bones () are two bones in the Human skull, skull which, when joined at a fibrous joint, form the sides and roof of the Human skull, cranium. In humans, each bone is roughly quadrilateral in form, and has two surfaces, four borders, and four angles. It is named from the Latin ''paries'' (''-ietis''), wall. Surfaces External The external surface [Fig. 1] is convex, smooth, and marked near the center by an eminence, the parietal eminence (''tuber parietale''), which indicates the point where ossification commenced. Crossing the middle of the bone in an arched direction are two curved lines, the superior and inferior temporal lines; the former gives attachment to the temporal fascia, and the latter indicates the upper limit of the muscular origin of the temporal muscle. Above these lines the bone is covered by a tough layer of fibrous tissue – the epicranial aponeurosis; below them it forms part of the temporal fossa, and affords attachment to the temporal muscle. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holotype
A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept. For example, the holotype for the butterfly '' Plebejus idas longinus'' is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany, an isotype is a duplicate of the holotype, where holotype and isotypes are often pieces from the same individual plant or samples from the same gathering. A holotype is not necessarily "typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeosubspecies
A chronospecies is a species derived from a anagenesis, sequential development pattern that involves continual and uniform changes from an extinct ancestral form on an evolutionary scale. The sequence of alterations eventually produces a population that is physically, Comparative anatomy, morphologically, and/or Genetics, genetically distinct from the original ancestors. Throughout the change, there is only one species in the lineage at any point in time, as opposed to cases where divergent evolution produces contemporary species with a common ancestor. The related term paleospecies (or palaeospecies) indicates an extinct species only identified with fossil material. That identification relies on distinct similarities between the earlier fossil specimens and some proposed descendant although the exact relationship to the later species is not always defined. In particular, the range of variation within all the early fossil specimens does not exceed the observed range that exists in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kabwe 1
Kabwe 1 (also called the Broken Hill skull, Rhodesian Man) is a Middle Paleolithic fossil assigned by Arthur Smith Woodward in 1921 as the type specimen for ''Homo rhodesiensis'', now mostly considered a synonym of ''Homo heidelbergensis''.Hublin, J.-J. (2013), "The Middle Pleistocene Record. On the Origin of Neandertals, Modern Humans and Others" in: David R. Begun (ed.), ''A Companion to Paleoanthropology'', John Wiley, pp. 517-537p. 523. The cranium was discovered in the lead and zinc mine of Broken Hill, Northern Rhodesia (now Kabwe, Zambia) on 17 June 1921 by Tom Zwiglaar, a Swiss miner, and an African miner whose name was not recorded. In addition to the cranium, an upper jaw from another individual, a sacrum, a tibia, and two femur fragments were also found. The skull was dubbed "Rhodesian Man" at the time of the find, but is now commonly referred to as the Broken Hill skull or the Kabwe cranium. The skull is kept in the Natural History Museum, London. Discovery Detai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neanderthal
Neanderthals (, also ''Homo neanderthalensis'' and erroneously ''Homo sapiens neanderthalensis''), also written as Neandertals, are an extinct species or subspecies of archaic humans who lived in Eurasia until about 40,000 years ago. While the "causes of Neanderthal disappearance about 40,000 years ago remain highly contested," demographic factors such as small population size, inbreeding and genetic drift, are considered probable factors. Other scholars have proposed competitive replacement, assimilation into the modern human genome (bred into extinction), great climatic change, disease, or a combination of these factors. It is unclear when the line of Neanderthals split from that of modern humans; studies have produced various intervals ranging from 315,000 to more than 800,000 years ago. The date of divergence of Neanderthals from their ancestor ''H. heidelbergensis'' is also unclear. The oldest potential Neanderthal bones date to 430,000 years ago, but the classification ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Ferrassie 1
La Ferrassie 1, often referred to as LF1, is a male Neanderthal skeleton estimated to be 70–50,000 years old. It was discovered at the La Ferrassie site in France by Louis Capitan and Denis Peyrony in 1909. The skull is the most complete Neanderthal skull ever found. With a cranial capacity of 1641 cm3, it is the second largest hominid skull ever discovered, after Amud 1, another Neanderthal. The skull displays many of the "classic" examples of Neanderthal anatomy, including a low, sloping forehead and large nasal openings. His leg and foot bones make it clear that Neanderthals walked upright like modern humans. The teeth are well preserved and the incisors are heavily worn down, suggesting they were used to hold objects. La Ferrassie 1 is most known for being the most complete Neanderthal skull; however, additional bones were also discovered. This is especially important due to the lack of bones that show a large number of Neanderthal characteristics. Along with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qafzeh Cave
Qafzeh Cave, also known by other names, is a prehistoric archaeological site located at the bottom of Mount Precipice in the Jezreel Valley of Lower Galilee south of Nazareth. Important remains of prehistoric people were discovered on the site - some of the oldest examples in the world, outside of Africa, of virtually anatomically modern human beings. These were discovered on the ledge just outside the cave, where 18 layers from the Middle Paleolithic era were identified. The interior of the cave contains layers ranging from the Neolithic era to the Bronze Age. Names The Arabic name of the mountain is Jebel el-Qafzeh, 'Mount of the Leap', and the cave's name is derived from it, Qafzeh Cave, sometimes spelled Qafza Cave, with article becoming al-Kafza (Cave). By translation to Hebrew, the name becomes Meʿarat Har HaKfitza, 'Leap Mount Cave', or sometimes Mt. HaKfitza Cave, HaKfitza(h) Cave, or Meʿarat Qafzeh. Another Hebrew name is Meʿarat Kedumim or Kedumim Cave. The various ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Klasies River Caves
The Klasies River Caves are a series of caves located to the east of the Klasies River mouth on the Tsitsikamma coast in the Humansdorp district of Eastern Cape Province, South Africa. The three main caves and two shelters at the base of a high cliff have revealed evidence of middle stone age-associated human habitation from approximately 125,000 years ago. The thick deposits were accumulated from 125,000 years ago. Around 75,000 years ago, during cave remodelling, the stratigraphic sediments were moved out into external middens. In 2015, the South African government submitted a proposal to add the caves to the list of World Heritage Sites. From 1960, Ronald Singer, Ray Inskeep, John Wymer, Hilary Deacon, Richard Klein and others suggested the excavation yielded the earliest known evidence of behaviourally modern humans. Further analysis suggested that the specimens fall "outside the range of modern variation". Morphology Analysis of 14 proximal ulnar dimensions compar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Clark Howell
Francis Clark Howell (November 27, 1925 – March 10, 2007), generally known as F. Clark Howell, was an American anthropologist. Born in Kansas City, Missouri, F. Clark Howell grew up in Kansas, where he became interested in natural history. He served in the U.S. Navy during World War II, from 1944 to 1946 in the Pacific Theater. Howell was educated at the University of Chicago, where he received his Ph.B., A.M. and Ph.D. degrees under the tutelage of Sherwood L. Washburn. Dr. Howell died of metastatic lung cancer on March 10, 2007 at age 81 at his home in Berkeley, California. Academic career Howell began his career in the Anatomy Department of Washington University in St. Louis, Missouri, in 1953, and stayed there for only two years before moving back to his alma mater, the University of Chicago. He went on to spend the next 25 years of his career there in the Department of Anthropology. He achieved a professorship in 1962 and became chairman of the department in 1966. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gen Suwa
Gen Suwa (born 1954) is a Japanese paleoanthropologist. He is known for his contributions to the understanding of the evolution of early hominids, including the discovery of a tooth from a hominid that was more than one million years older than the oldest previously known hominid. The discovery changed scientific opinion regarding the ancestral splits between humans, chimps and gorillas. A professor at The University Museum of the University of Tokyo, Suwa is a foreign associate of the National Academy of Sciences and a recipient of the Asahi Prize. Biography Suwa completed an undergraduate degree in biology from the University of Tokyo, and he earned a master's degree in biological anthropology from the same institution in 1980. He earned a Ph.D. in anthropology at the University of California, Berkeley. He began to study hominid fossils in Ethiopia during his doctoral studies. He worked with Berkeley anthropology professor Tim D. White and has continued to collaborate with him ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argon–argon Dating
Argon–argon (or 40Ar/39Ar) dating is a radiometric dating method invented to supersede potassiumargon (K/Ar) dating in accuracy. The older method required splitting samples into two for separate potassium and argon measurements, while the newer method requires only one rock fragment or mineral grain and uses a single measurement of argon isotopes. 40Ar/39Ar dating relies on neutron irradiation from a nuclear reactor to convert a stable form of potassium (39K) into the radioactive 39Ar. As long as a standard of known age is co-irradiated with unknown samples, it is possible to use a single measurement of argon isotopes to calculate the 40K/40Ar* ratio, and thus to calculate the age of the unknown sample. 40Ar* refers to the radiogenic 40Ar, i.e. the 40Ar produced from radioactive decay of 40K. 40Ar* does not include atmospheric argon adsorbed to the surface or inherited through diffusion and its calculated value is derived from measuring the 36Ar (which is assumed to be of atmosphe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
