In 2004, Will Smith headlined the sci-fi spectacle 'I, Robot,' but fans may not know that Alan Tudyk also starred in the poignant blockbuster hit.

Fossilized teeth show that two different kinds of ancient human ancestors coexisted more than 2 million years ago. One of ...

Modern humans emerged roughly 300,000 years ago, but our genus Homo is much older. So what's the oldest human species on ...

Evidence is mounting that the evolution of our species is more convoluted than we imagined — more like a braided stream than ...