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

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

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

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

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 ...

WASHINGTON >> Bipedal locomotion — walking upright on two legs — is a fundamental trait underpinning humankind’s success. Scientists have now identified two innovations that occurred long ago in the ...

The shift from lizard-like sprawl to upright walking in mammals wasn’t a smooth climb up the evolutionary ladder. Instead, it was a messy saga full of unexpected detours. Using new bone-mapping tech, ...

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 ...