Sloths are notoriously slow. Living in rainforests in Central and South America, sloths spend most of their time hanging upside down in the trees, rarely coming down to the ground. There are two main ...

The Small Mammal House at the Smithsonian’s National Zoo has a new resident worth slowing down for. Visitors can now see Athena, a 1½-year-old female two-toed sloth in her new home that she shares ...

Ancient sloths ranged in size from tiny climbers to ground-dwelling giants. Now, researchers report this body size diversity was largely shaped by sloths’ habitats, and that these animals’ precipitous ...

Let the awws commence. This is one of those cute sloth pictures that’s also a little mischievous—why is this little guy smirking? We wouldn’t mind hanging out with this sweet sloth! The green brings ...

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Conventional wisdom has it that sloths are simple, lazy creatures that do very little other than sleep all day. Even the very name “sloth” in most languages translates to some version of “lazy.” It ...

They might look awkward doing it, but sloths are actually pretty good swimmers. They are often observed swimming with ease across rivers in their native Central and South America. If seen paddling ...

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.

People expect sloths to behave like other tree-dwelling animals. Their body temperature changes with the environment, and ...