Long before today’s tree-dwelling sloths, a 4-ton giant roamed South America — and it may have stood and fought like a bear.

“Sloths are inherently limited by their slow metabolism and unique inability to regulate body temperature effectively, unlike most mammals,” Cliffe explained in an accompanying statement. “Our ...

Sloth selfie bans are spreading because cute photos hide stress, disease risk, and illegal wildlife trade most tourists never see.

It’s not considered polite to talk about it, but we all do it. Some of us are in and out so quickly that nobody would even know we were gone. Others quietly get up from the sofa, tuck a newspaper ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Central and South America’s sloth populations may face a dire ...

Sloths are some pretty interesting animals. Beyond their reputation for being slow, a host of different traits reveals a lot ...

Sloths always have a slight smile on their lips, making them appear friendly and cute. These incredibly slow tree dwellers ...

Among the greatest mysteries of the tropical rainforest are the pooping habits of sloths. Really. Those furry, slow-moving tree dwellers almost never descend from the safety of the tree tops—except ...