Recent fossil finds could mean that "Lucy" wasn't our direct ancestor, some scientists say. Others strongly disagree.

Our species is the last living member of the human family tree. But just 40,000 years ago, Neanderthals walked the Earth, and hundreds of thousands of years before then, our ancestors overlapped with ...

In 1997, scientists announced that an abundance of unique human fossils excavated from a cavern in Spain made it clear that it was time to add a new species to the human genus: Homo antecessor. But ...