In the natural world -- where predators pounce, prey flee, and group members feed and sleep in solidarity -- animal behavior is glorious in its variety. Now, new research suggests there may be an ...

A new discovery is rewriting the history of evolution by millions of years - The emergence of the first land-dwelling animals ...

Tracks in Australia seem to be the earliest known prints of amniotes — a group that includes reptiles, birds and mammals.

Scientists have long wondered why some mammals live dramatically longer than others. While humans can reach ages beyond a ...