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 ...

Following is the text of the video. Three-toed sloths are the slowest mammals on Earth, but you shouldn't assume they're just lazy. Sloths are slow for a reason... survival! They've been on Earth ...

During the Ice Age, some mammals were particularly large. The giant sloth had adapted very well to the climatic conditions. The reason for its extinction was unclear for a long time - until ...