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The first member of the genus Homo to be hairless was Homo erectus, originating about 1.6 million years ago. [6] The dissipation of body heat remains the most widely accepted evolutionary explanation for the loss of body hair in early members of the genus Homo, the surviving member of which is modern humans.
The extant Homo heidelbergensis (cladistically granting Homo sapiens), which was originally African, emerged within the Asian Homo erectus. Contemporary groups appear to have been interbreeding, so any phylogeny like this only gives a coarse impression of the evolution of Homo , and extinct lineage may have partially continued in other groupings.
Homo erectus derives from early Homo or late Australopithecus. Homo habilis, although significantly different of anatomy and physiology, is thought to be the ancestor of Homo ergaster, or African Homo erectus; but it is also known to have coexisted with H. erectus for almost half a million years
Homo erectus was the first ancient human to migrate out of Africa about 1.9 million years ago. Although Homo erectus had a gait and body size similar to modern humans, researchers think the ...
The study authors said their findings support an existing theory that the hobbits evolved their small size a long time ago and were most likely a dwarfed version of Homo erectus, the first ancient ...
Subsequently, genetics has been used to investigate and resolve these issues. According to the Sahara pump theory evidence suggests that the genus Homo have migrated out of Africa at least three and possibly four times (e.g. Homo erectus, Homo heidelbergensis and two or three times for Homo sapiens). Recent evidence suggests these dispersals ...
Homo habilis could have developed some baseline behavioural flexibility prior to its expansion into the peripheries (such as encroaching into the predatory guild [45] [46]). This flexibility could then have been positively selected and amplified, leading to Homo erectus ' adaptation to the peripheral open habitats. [47]
They are believed to have begun approximately 2 million years ago with the early expansions out of Africa by Homo erectus. This initial migration was followed by other archaic humans including H. heidelbergensis , which lived around 500,000 years ago and was the likely ancestor of Denisovans and Neanderthals as well as modern humans.