Picture this: 4.4 million years ago, a small female creature named Ardi roamed the woodlands of what is now Ethiopia. She was not fully ape and not fully human. She was something beautifully ...

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 ...

On the ancient plains of Ethiopia, early human relatives were already trying out different ways of being upright. If you grew up hearing about Lucy as the main star of that era, new fossil finds ...