It’s pretty surprising to see a 27-year-old jump into her mother’s arms and insist on being held like a baby. At The Sloth Sanctuary outside of Cahuita, Costa Rica, though, such a sight is ordinary.

But when it comes to their biology, the Central and South American critters are anything but boring. "Thirty percent of their body weight is just digesting, fermenting leaves," says Cliffe. "So ...

Becky Cliffe does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...

While humans wouldn’t be very happy to find that organisms were growing on their skin, particularly fungi, algae, and insects, it works out pretty well for sloths. Sloths may be hosting entire ...

The internet can't get enough cute sloths, those odd-looking critters that live in the trees of Central and South America. Sloth fanatics can find photo galleries of baby sloths, sloth tattoos, what ...

Sloths spend most of their time eating and hanging around in trees. Nice as that kind of lifestyle sounds, it's easy to see how it might get a little uncomfortable after a while. With a full stomach, ...