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  2. Brain size - Wikipedia

    en.wikipedia.org/wiki/Brain_size

    The size of the brain is a frequent topic of study within the fields of anatomy, biological anthropology, animal science and evolution.Measuring brain size and cranial capacity is relevant both to humans and other animals, and can be done by weight or volume via MRI scans, by skull volume, or by neuroimaging intelligence testing.

  3. Cerebral rubicon - Wikipedia

    en.wikipedia.org/wiki/Cerebral_rubicon

    The minimum cranial capacity for the species Homo sapiens is generally set at 900cc. [ 1 ] One of the reasons for the proposal to exclude Homo habilis from the genus Homo , and renaming it as " Australopithecus habilis ", is the small capacity of their cranium (363cc -600 cc).

  4. Evolution of the brain - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_the_brain

    The evolutionary history of the human brain shows primarily a gradually bigger brain relative to body size during the evolutionary path from early primates to hominins and finally to Homo sapiens. This trend that has led to the present day human brain size indicates that there has been a 2-3 factor increase in size over the past 3 million years ...

  5. Homo - Wikipedia

    en.wikipedia.org/wiki/Archaic_humans

    Homo (from Latin homō '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.

  6. Australopithecine - Wikipedia

    en.wikipedia.org/wiki/Australopithecine

    They exhibited greater sexual dimorphism than members of Homo or Pan but less so than Gorilla or Pongo. It is thought that they averaged heights of 1.2–1.5 metres (3.9–4.9 ft) and weighed between 30 and 55 kilograms (66 and 121 lb). The brain size may have been 350 cc to 600 cc. The postcanines (the teeth behind the canines) were relatively ...

  7. Homo naledi - Wikipedia

    en.wikipedia.org/wiki/Homo_naledi

    They are estimated to have averaged 143.6 cm (4 ft 9 in) in height and 39.7 kg (88 lb) in weight, yielding a small relative brain size, encephalization quotient, of 4.5. H. naledi brain anatomy seems to have been similar to contemporary Homo, which could indicate comparable cognitive complexity. The persistence of small-brained humans for so ...

  8. Expensive tissue hypothesis - Wikipedia

    en.wikipedia.org/wiki/Expensive_Tissue_Hypothesis

    The expensive tissue hypothesis (ETH) relates brain and gut size in evolution (specifically in human evolution).It suggests that in order for an organism to evolve a large brain without a significant increase in basal metabolic rate (as seen in humans), the organism must use less energy on other expensive tissues; the paper introducing the ETH suggests that in humans, this was achieved by ...

  9. Dmanisi skull 3 - Wikipedia

    en.wikipedia.org/wiki/Dmanisi_skull_3

    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.