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

Learn how detailed 3D analysis uncovered evidence that upright walking emerged near the very start of the human lineage.

A seven-million-year-old skull found in Chad sits at the center of a long argument about human origins. The species, ...

The oldest ancestor of humans may be a seven-million-year-old ape, which started walking upright two million years earlier than other hominids.

A new fossil analysis supports the idea a human ancestor was walking upright far earlier than previously thought.

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

A big difference between humans and other apes is the ability to stride easily on two feet. A new analysis of fossil bones shows that adaptations for bipedal walking go back 7 million years.

In recent decades, scientists have debated whether a seven-million-year-old fossil was bipedal—a trait that would make it the ...

Scientists may have just pushed back the timeline for when our ancestors first started walking upright. A new study suggests ...

Scientists may have cracked the case of whether a seven-million-year-old fossil could walk upright. A new study found strong ...

Scientists argue ape-like Sahelanthropus tchadensis that lived in Africa 7m years ago is best contender but more fossils are needed ...

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 ...