as speech is a uniquely human trait). Thus, understanding the evolutionary history of living species amounts to understanding where on the tree of life these species' distinctive traits arose.

The footprints were left in the mud by two different species "within a matter of ... that these two extinct branches of the human evolutionary tree — called Homo erectus and Paranthropus boisei ...

A newly discovered set of footprints in Kenya provides the first evidence that two different species of ancient human ...

Researchers have used distinct markers from human subpopulations to trace back to our common African root in a giant human "tree ... African origin of the human species, but it argues that ...

The term hominin refers to all species in the human family tree that emerged after the split from the ancestors of the great apes 6 million to 7 million years ago. This group includes more ...

The finger and toe bones are curved, suggesting climbing was still an important activity for this species There's a new addition to the family tree: an extinct species of human that's been found ...

Two species of ancient human relatives crossed paths 1.5 million years ago. Fossilized footprints in Kenya captured the ...