Researchers analyzed fossils and DNA to get a big-picture view of sloth evolution and determine what drove their immense size ...

But as the planet cooled again, sloths began to bulk up. The largest ground sloths emerged during the Ice Ages. Big bodies ...

Ahead of a road construction project in Lubbock, Texas, the state's Department of Transportation sent archaeologists to ...

Massive Megatherium sloths once stood as large as Asian elephants, ripping foliage off treetops with prehensile tongues like ...

The larger sloths didn’t do much tree climbing, at risk of falling to their deaths. Instead, they survived by being ...

Explore how ancient sloths evolved in size, from small climbers to massive ground dwellers, shaped by shifting climates and ...

Most of us are familiar with sloths, the bear-like animals that hang from trees, live life in the slow lane, take a month to digest a meal and poop just once a week. Their closest living relatives are ...

A new fossil and DNA analysis traces how dozens of sloth species responded to climate shifts and humans. Just two small tree-dwelling sloths remain today.

Recent archaeological excavations at a highway construction site in West Texas have uncovered the fossilized remains of Ice ...

But who doesn’t love digging up big ol’ animals ... "We know we found the giant ground sloth by the distinctive tooth that was discovered," said Jason Britsch, Amarillo Public Information ...

The sloth bear is an elusive and iconic species, recognized as a key wildlife attraction and a member of Sri Lanka’s “Big Five” wildlife species, alongside the elephant and leopard ...