The extinct giant ground sloths were some of the only mammals that had digestive systems large enough to process the huge avocado seeds whole. They feasted on the fruit and then dispersed the ...

The video above from the Natural History Museum in London details what’s going on in a sloth’s fur. Its skin and fur create a habitat filled with fungi, beetles, moths, and sandflies.

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 ...