Today, sloths are slow-moving, tree-dwelling creatures that live in Central and South America and can grow up to 2.5 feet ...

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

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

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

The extinct mammals were about five times larger than a grizzly bear–and filled caves with their poop.

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.

An exhibition featuring skeletons and models of giant prehistoric animals is heading to Birmingham and Edinburgh early next ...

the size of sloths hardly changed at all for about 20 million years, irrespective of their preferred method of locomotion. Then something earth-shattering occurred. A giant wound opened up between ...