On December 7, two sloth bear cubs were born at the Smithsonian National Zoo. It marks the first time in 12 years that cubs ...

Sloths appear defenseless, slow, and vulnerable in ecosystems filled with predators. Yet despite these disadvantages, they ...

It’s the first column of the year and I have to be honest here, I just spent the last couple of weeks being a bit of sloth.

The natural world is full of animals that seem to defy logic, blurring the line between reality and imagination. Some look ...