Giant sloths are among the most famous of the megafauna, living alongside wooly mammoths and saber-toothed cats. While a changing climate and habitat transformation would have played a part in their ...

Mexican scientists said Wednesday they have discovered the fossilized remains of a previously unknown species of giant sloth that lived 10,000 years ago and died at the bottom of a sinkhole. The ...

Although it sounds like a grade-B science fiction movie, fossils show that our ancestors once hunted and fought giant ground sloths. For the first time, scientists have uncovered fossilized footprints ...

SAO PAULO (AP) — Sloths weren’t always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense claws. For ...

Today, the six living species of sloths are usually found dangling from tree branches, or going viral on YouTube. But sloths used to be a lot more diverse—and a lot bigger. The extinct ground sloths ...

Researchers found human-modified giant sloth bones dating to 25,000–27,000 years ago in Brazil, potentially pushing back South America’s earliest human presence by 12,000 years. Scientists used ...