Long before modern sloths became slow-moving tree dwellers, their ancestors were enormous ground beasts. These ancient sloths ...

Most animals relieve themselves regularly, but sloths drop down from trees just once a week for this task. They use the same spot every time, which makes them vulnerable to predators. Scientists still ...

The apparent docility and friendliness of “smiling” sloths have made them tourist darlings, but have also put a target on their backs. The rise in trafficking of these animals led the governments of ...

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.

Stone Zoo in Stoneham, Massachusetts, is welcoming the facility’s newest – if not the slowest – member of the animal community. The Linne’s two-toed sloth pup, whose gender is not yet known, was born ...

Giant sloths with razor-sharp claws and as large as Asian bull elephants once roamed the Earth, snacking on leaves at the tops of trees with a prehensile tongue. Now, scientists have figured out why ...