These are skull casts from human evolution. Left to right: Australopithecus afarensis, Homo habilis, Homo ergaster, Homo erectus and Homo neanderthalensis. Disclaimer: AAAS and EurekAlert!

This skull, attributed to Homo habilis, is small, with a cranial capacity of just 510 cubic centimeters. Most Homo habilis skulls have a larger cranial capacity, around 600 cubic centimeters ...

Homo habilis, and Homo rudolfensis, for example. But an amazing new skull found in Africa suggests that the specimens previously representing different species could come from a single ...

robustus had a large, "robust" (heavier, thicker) skull, as well as a jaw and large ... boisei walked upright. Homo habilis, which actually means "handy man," is apparently the first species ...

robustus had a large, "robust" (heavier, thicker) skull, as well as a jaw and large ... boisei walked upright. Homo habilis, which actually means "handy man," is apparently the first species ...