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

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

The origin story of the human species is far from set in stone. But what is set in stone is the fossil evidence that scientists study as they piece together our origin story. National Geographic ...

Ardi is the oldest known partial skeleton of a hominin and shows foot features that are transitioning from vertical climbing to bipedal walking. While Ardi has the primitive grasping big toe of the ...