Sloth bears are the world's deadliest bear. As their habitat shrinks, India's forest communities are finding ways to co-exist ...

The giant sloth didn't have enamel on its teeth like humans and even other giant extinct mammals such as mammoths. Scientists usually use enamel as a way to study a creature's diet.

Sloths may be cute from afar, but they “have extremely powerful jaws” and “can break bones with their teeth,” explained zoologist and Sloth Institute director Sam Trull.

Because all existing sloths are vegetarians and because Megatherium lacked the sharp killing teeth typical of carnivores, paleontologists have assumed that it, too, was an herbivore. Richard Fariña, a ...

They’re slow, they’re sleepy, and they’ve taken over the internet—but sloths are more than just cute animals hanging from trees. These leaf-munching creatures live a strange and ...

CC0 Usage Conditions ApplyClick for more information. How (and why) do we brush our sloth bears' teeth? When they suck up insects, they sometimes get a few dents and dings along with their meal. Check ...

A fossil of the extinct ground sloth, Megalonyx jeffersonii, was found in Ellis County, Kansas, offering new insight into its presence in the Great Plains.

She is not just your garden-variety serial-killing sloth. In addition to being able to tear people apart with her claws and teeth, she can use a computer, a cellphone and, in an inspired bit of ...

The survival of sloths is under threat due to climate change, according to a new study. The famously slow-moving — and adorable — creatures of Central and South America could die out if ...