And what a skull it is. It suggests that the earliest known members of the Homo genus (H. habilis, H. rudolfensis and H. erectus) may not have been distinct, coexisting species, at all.

The Homo genus began approximately 2.3 million years ago with Homo Habilis, the first species in this lineage, which led to modern humans, Homo sapiens sapiens. Fossils of Homo Habilis were found ...

Homo habilis: cranium Usage Conditions Apply ... NMNH - Anthropology Dept. Original Object Identifier KNM-ER 1813 Species Homo habilis dpo_3d_200061 NMNHANTHRO NMNH - Anthropology Dept.

Still, KNM-ER 1813 is similar to many of the accepted Homo habilis specimens from Olduvai Gorge. The similarities include overall size, smaller orbits, and sub-nasal prognathism (projection of the ...

Farmers Dug Up a Skull Unlike Any Human Ancestor Ryan Somma from Occoquan, USA, CC BY-SA 2.0 , via Wikimedia Commons ...