Scientists have identified and named over a million animal species, and there are millions more yet to be discovered across Earth's seven continents. But which continent has the most animal species?

Covering significant parts of North America, Europe, Asia and Australia, this “megacolony” of Argentine ants is the largest collaborative unit ever recorded among animals. Argentine ants from ...

similar animals could have lived at the same time on what are now widely separated continents. You probably wouldn't recognize the Earth if you could see it 225 million years ago. Back then ...