The Smithsonian's National Zoo in Washington, D.C., has welcomed two sloth bear cubs, marking the first time the zoo has had ...

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 ...

According to the Smithsonian, sloth bears grow to between five and six feet long, stand between two and three feet and weigh ...