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, ...

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

Fresh findings about arm and leg bones advance the debate over whether Sahelanthropus tchadensis was bipedal, but not ...

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

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

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.

Scientists uncover fossils suggesting Sahelanthropus tchadensis, a 7-million-year-old ancestor, could walk upright. Could this tiny bipedal ape-like hominin rewrite what we know about the earliest ...

Because it's easier than walking on four. That's the basic finding of a study conducted by a team of researchers that included University of Arizona anthropologist David Raichlen. Its findings appear ...