An Ice Age giant was tumbling around North America during the Late Pleistocene. About the size of a bear, it was actually a ...

Ancient sloths lived in trees, on mountains, in deserts, boreal forests and open savannahs. These differences in habitat are primarily what drove the wide difference in size between sloth species.

What do you get when you cross a sloth with a bear? Well, that one's easy: you get a sloth bear, which, while not actually related to true sloths in any way, does share more than a passing resemblance ...

Imagine a sloth. You probably picture a medium-sized, tree-dwelling creature hanging from a branch. Today's sloths—commonly ...

Gaylene Thomas, a wildlife care manager at the San Diego Zoo, oversees two teams that care for a variety of species, ...