"Lions and hyenas coexist peacefully, ignoring each other in the wild." ...

A new study suggests the platypus and echidna — the only egg-laying mammals — had a water-dwelling ancestor. The finding ...

Chimpanzees are often cast as a mirror to our darkest tendencies, embodying violence, territoriality and power struggles. In ...

We may have gotten the evolutionary origins of the echidna backward, as new research suggests its ancestors probably lived in ...