Photo caption: Little Foot was discovered in the 1990s in a cave in South Africa and is the most intact ancient skeleton of any human ancestor. Disclaimer: AAAS and EurekAlert! are not responsible ...

Walking and running upright on two feet as humans do requires some specialized adaptations of the skeleton and muscles. Modern human anatomy has built on the strengths and the weaknesses of a body ...

The bones that make up Ardi's feet suggest that humans and chimpanzees evolved separately. Lucy is also a female human-like fossilised skeleton, and dates from 3.2 million years ago. Lucy's bones ...