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KNM-ER 3883 is a significant fossil specimen of early African Homo erectus, dating to approximately 1.5–1.6 million years ago.This cranium, discovered in Kenya, has an endocranial volume exceeding 800 cc, which is substantially larger than earlier Homo species and suggests a notable increase in brain size.
The brain size of H. erectus varies considerably, but is generally smaller in H. erectus sensu lato, as low as 546 cc (33.3 cu in) in Dmanisi skull 5. [53] Asian H. erectus overall are rather big-brained, averaging roughly 1,000 cc, [ 46 ] staying within the range of variation for modern humans. [ 54 ]
D4500's features are very rare compared to early Homo in that it had a small braincase yet an unusually large prognathic face. [2] "Skull 5" has an accompanying mandible, D2600, which was found in 2000. In 1999 two other skulls had been found at the same site—D2280 and D2282. D2280 was a near-complete brain-case with 780 cc brain-size.
Asian H. erectus overall are rather big-brained, averaging roughly 1,000 cc. [89] Encephalisation quotients (the ratio between observed to predicted brain mass for an animal of a given size, cautiously used as an indicator of intelligence) typically score from three to four for "classic" H. erectus assuming a body weight on the whereabouts of ...
Further conclusions about the growth and development in early Homo can be drawn from the Mojokerto child, a ~1.4–1.5 million year old ~1-year old Asian H. erectus, which had a brain at about 72–84% the size of an adult H. erectus brain, which suggests a brain growth trajectory more similar to that of other great apes than of modern humans. [52]
Solo Man (Homo erectus soloensis) is a subspecies of H. erectus that lived along the Solo River in Java, Indonesia, about 117,000 to 108,000 years ago in the Late Pleistocene. This population is the last known record of the species.
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Homo (from Latin homÅ 'human') is a genus of great ape (family Hominidae) that emerged from the genus Australopithecus and encompasses only a single extant species, Homo sapiens (modern humans), along with a number of extinct species (collectively called archaic humans) classified as either ancestral or closely related to modern humans; these include Homo erectus and Homo neanderthalensis.