Sloths are so slow that moss and fungi can grow on their fur! They move at an average speed of 0.17 miles per hour. This leisurely pace conserves energy as their diet is low in calories. Sloths have ...

SAO PAULO (AP) — Sloths weren’t always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense ...