A new study has uncovered evidence that a giant marine reptile from the Early Jurassic period used stealth to hunt its prey ...

For years, it's been assumed that sloths don't fart. But new footage of a baby sloth letting rip in a water bath has shown that, contrary to popular belief, these tree-dwellers are actually incredibly ...

Ambitious projects aim to put dire wolves, woolly mammoths and passenger pigeons back into our ecosystems. But with so many ...

A 33,000-year-old sloth bone discovered in Uruguay reveals signs of possible human-made trauma, suggesting early human interaction with megafauna in South America.

The largest sloth of all time was the size of an elephant. Known to paleontologists as Eremotherium, the shaggy giant ...

Some say we quickly killed off the giant mammals that lived here, like mastodons, saber-toothed cats, and giant sloths.

When a stray dog nonchalantly strolled into the White House gardens during a press briefing, the internet couldn't get enough ...

Discover the fascinating evolution of sloths, from towering giants to today's smaller tree-dwellers, and learn what led to the extinction of their colossal relatives.