Sloths are known for their slow and sleepy nature. These cute mammals, which spend most of their time upside down, can be found in the trees of South America and Central America. These mellow-looking ...

Defecating exposes sloths to predators on the jungle floor. An unexpected ally benefits, and returns the favor. A brown-throated three-toed sloth peers over a tree's buttress root while defecating on ...