"Six kinds of sloths hang out in the trees of Central and South America. Small, lightweight, and camouflaged, they move slowly, eat slowly, and even poop slowly. But did you know there were dozens of prehistoric sloth species, nothing like their modern descendants? They lived on the ground. Some were as big as cars. Some foraged in the ocean. Some roamed the plains in packs. Find out more in this accessible, informed, and gorgeously illustrated picture book that pairs compares these beguiling modern forest-dwellers with their ancient ancestors." --