Most of us are familiar with sloths, the bear-like animals that hang from trees, live life in the slow lane, take a month to ...

An analysis of the sloth family tree suggests three different groups of the animals evolved to gigantic sizes in response to ...

Biologists said an unusual animal death deep in the Florida Everglades led to a positive surprise. Officials said they found ...

A group of fossils of elasmosaurs—some of the most famous in North America—have just been formally identified as belonging to ...

There’s a good chance you’ve never heard of it, let alone seen it, but this may be one of the most ubiquitous animals on the ...