The way Sahelanthropus tchadensis moved has long been debated. The discovery of a small bump on the front of the thigh bone ...

The pelvis is often called the keystone of upright movement. It helps explain how human ancestors left life on all fours ...

Scientists working in Ethiopia's Afar Region have made discoveries that rewrite our understanding of early human history. For ...

New study of 7-million-year-old fossils from Chad proves Sahelanthropus tchadensis walked upright while still climbing trees.

Jawbones and other remains, similar to specimens found in Europe, were dated to 773,000 years and help close a gap in ...

Scientists uncover fossils suggesting Sahelanthropus tchadensis, a 7-million-year-old ancestor, could walk upright. Could ...

Paleoanthropologists have announced the world's most complete skeleton of Homo habilis, a human ancestor that lived more than ...

The oldest distinguishing feature between humans and our ape cousins is our ability to walk on two legs—a trait known as bipedalism. Among mammals, only humans and our ancestors perform this atypical ...

A new analysis of some fossil bones shows that adaptations for bipedal walking may go back 7 million years in the human family tree.

Humans have been walking on two legs for millions of years. All vertebrate species have a pelvis, but only humans use it for upright, two-legged walking.* The evolution of the human pelvis, and our ...

A long-running and bitterly fought dispute over whether the earliest known hominin had a knuckle-walking gait, like ...

A landmark study of an ancient thigh bone confirms when our earliest ancestors stood upright. This discovery proves that the ...