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

New research shows 8,000-pound sloths once dug caves, adapted to oceans, and roamed widely—until climate and humans brought their downfall.

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

33. See cougars, capybaras, jaguars, tigers, tapirs, bears, otters, koalas, kookaburas and more at the Palm Beach Zoo. Bring swimsuits for the zoo's fountain and splash pad. Bring your appetite for ...

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

Some of the wildest legends may actually be rooted in reality. Ancient people didn’t have science textbooks, just bones in ...

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