Human ancestors may have walked on two legs 7 million years ago

An analysis of thigh and forearm bones from Sahelanthropus tchadensis suggests the early hominin was mainly bipedal, but the claim is controversial

Human ancestors may have walked on two legs 7 million years ago
An analysis of thigh and forearm bones from Sahelanthropus tchadensis suggests the early hominin was mainly bipedal, but the claim is controversial