These would be a male and female specimen of Homo habilis, a hominin species that evolved in Africa around 2.4 million years ago. Although it retained many of the “ape-like” physical traits found in earlier hominins (such as the various species of Australopithecus), Homo habilis stands out from its ancestors by having a proportionately larger braincase, starting the transition to the big brains of modern humans (Homo sapiens). Homo habilis is also known to have manufactured stone tools of the Oldowan industry, which it would have used mainly to butcher meat from animal carcasses.