Why three-toed sloths risk their lives to help moths Defecating exposes sloths to predators on the jungle floor. An unexpected ally benefits, and returns the favor.

A prehistoric discovery near Hays is shedding some new light on a giant ground sloth species that lived more than 10,000 years ago.

During an environmental review for Loop 88 construction, officials discovered large, prehistoric animal bones.

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 ...

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

Sloths have a reputation for being sluggish and slow, spending most of their lives dozing in trees, but a new study suggests this is one of the enduring secrets of their success.

Scientists have analyzed ancient DNA and compared more than 400 fossils from 17 natural history museums to figure out how and why extinct sloths got so big.

Stretching exercises are as much a part of strength training as a mat is to yoga. Here are 17 of the most effective ones for the whole body.

“We know we’ve found Giant Ground Sloth by its distinctive tooth,” said Chris Ringstaff, project planner with TxDOT’s environmental affairs division. “We’re here to get the road built.

Tasha, a 20-year-old sloth bear, has died at Woodland Park Zoo following a grim diagnosis.

Bellingham’s I-5 sloth remains in the trees as WSDOT cites safety and resource challenges. The beloved landmark continues to delight locals and visitors.

A sloth in Cheshire has successfully undergone “pioneering” surgery to cure its toothache. Rico, 25, is believed to be the first sloth to undergo this operation, carried out by a team at ...