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

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

Human history features a pivotal moment when four-legged beings stood upright on two legs. Scholars regard this shift as the ...

A fossil belonging to an ancient hominin that lived seven million years ago bears the hallmarks of bipedalism, according to a ...

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

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

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

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.

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

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

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 ...