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

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

A seven-million-year-old fossil may rewrite human origins, showing our ancestors were walking upright far earlier than anyone expected.

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

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 ...

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 ...

“For over a hundred years, it was hypothesized that our ancestors lived in grassland savannahs and that this major ecosystem change drove human evolution, including the origins of bipedalism and ...

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

The chimp with the most human-like gait and body type walked upright more efficiently than he knuckle-walked a finding that study co-author Herman Pontzer calls a snapshot of how this evolution may ...