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

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

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

A controversial hominid that lived 7 million years ago may have walked on two legs after all, according to a new analysis of ...

It's considered one of the most decisive steps in human evolution. Now, scientists believe they have pinpointed when our ...

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

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

Using 3D technology and other methods, the team identified Sahelanthropus’s femoral tubercle, which is the point of ...

A new analysis of these primordial bones offers evidence that Sahelanthropus was our first known ancestor to regularly walk on two feet, a sign that bipedalism evolved early in our lineage.

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.

This tiny bump on an ancient thigh bone has become a big deal for anyone trying to pin down when the human story truly began.