In this 4.4-million-year-old skeleton, scientists may have found the missing step between climbing and walking.

A 4.4-million-year-old Ardipithecus fossil named "Ardi" shows early humans walked upright, keeping ape-like climbing ...

Analysis of a 4.4-million-year-old ankle bone supports the hypothesis that the earliest humans evolved from an ape-like ...

Since being discovered in 1994, Ardi’s 4.4-million-year-old remains have been at the heart of an anthropological debate. To ...

There are estimated to be fewer than 800 Tapanuli orangutans left in the wild, living in a small patch of forest in North ...