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

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

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 ...

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 ...

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.

Sloths have a reputation for being sluggish and slow, spending most of their lives dozing in trees, but a new study suggests ...

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 ...