There’s some news about everyone’s favorite great-great-great-great-great-(etc.) aunt, Lucy. Also known as AL 288-1 and Dinkinesh, our shared ancestor (or rather, 40 percent of her skeleton) was ...

According to a new study, chimpanzees, like humans, must contend with a confined bony birth canal when giving birth. In humans, the problem was exacerbated by our unique form of upright walking since ...

The partial skull and jaw fragments of Sahelanthropus tchadensis are the earliest hominin finds known. (Credit: Didier Descouens/Creative Commons 4.0) Roughly 8 million years ago, some apes stood up ...

Humans' ability to walk upright on two legs may have evolved in trees, rather than on the ground, according to scientists studying wild chimpanzees in Tanzania. This contradicts the widely accepted ...

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 ...

Walking upright on two legs is one of the key traits that sets humans apart from other primates. Now, scientists are ...

WASHINGTON (AP) -- Maybe walking upright on two legs isn't such a defining human feature after all. Scientists who spent a year photographing orangutans in the rain forest say the trait probably ...