Thaís Pansani examines the marks humans left on megafauna bones to determine when people arrived in South America and how ...

The curious kids suspected it was a bone from a very big animal that once lived in the Santa Cruz Mountains ... recognized it as a fossil arm bone likely belonging to an ancient sloth, museum ...

If caught on land, these animals have no chance to evade predators, such as big cats, and must try to defend themselves by clawing and biting. Though they couldn't be clumsier on land, sloths are ...

If caught on land, these animals have no chance to evade predators, such as big cats, and must try to defend themselves by clawing and biting. Though they couldn't be clumsier on land, sloths are ...

Following is a transcript of the video. Narrator: If there's one thing you know about sloths, it's that they're, well, slow. But that doesn't mean they're boring. In fact, sloths are one of the ...

After leaving his car windows open overnight, the man documented his adorable sloth encounter in a now-viral video A driver in Brazil has discovered what it's really like to encounter a slowpoke ...

The brown-throated sloth had already made it across a road, but to reach the next clump of trees it needed to return to the ground and crawl. That was when it met this big dog. When this sloth sensed ...