Sloths are among the strangest mammals on Earth. They move incredibly slowly, sometimes only a few feet per minute, and can hang from a single limb for long periods of time. Their metabolism is the ...

Fast animals get plenty of attention for their incredible feats of speed. But what about animals that move at a slower pace? "We definitely are programmed to think that speed is good," said James ...

A sloth scientist, her tree-climbing BFF, and their dog work to save Costa Rica’s sloth populations. A sloth scientist, her tree-climbing BFF, and their dog work to save Costa Rica’s sloth populations ...

A sloth in its natural habitat in Costa Rica, where sloth populations have decreased in the past decade, according to Rebecca Cliffe, lead author of the research. Bernd Dittrich via Unsplash In the ...

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

A sloth at Cotswold Wildlife Park celebrated World Sleep Day.

Two female sloths named Chata and Baby Ruth have, slowly, taken up residence at the Jacksonville Zoo and Gardens. Chata is a 29-year-old Hoffman’s two-toed sloth, while Baby Ruth is a 6-year-old ...