Among the greatest mysteries of the tropical rainforest are the pooping habits of sloths. Really. Those furry, slow-moving tree dwellers almost never descend from the safety of the tree tops—except ...

It’s not considered polite to talk about it, but we all do it. Some of us are in and out so quickly that nobody would even know we were gone. Others quietly get up from the sofa, tuck a newspaper ...

Three-toed sloths descend from the canopy about once a week to defecate, risking predation during one of the most dangerous moments of their lives. A single sloth bowel movement can account for up to ...