Add Yahoo as a preferred source to see more of our stories on Google. © Smithsonian’s National Zoo and Conservation Biology Institute The post A Win for the ...

Long before today’s tree-dwelling sloths, a 4-ton giant roamed South America — and it may have stood and fought like a bear.

Eisenberg, John F. and Maliniak, Eugene. 1985. "Maintenance and reproduction of the two-toed sloth Choloepus didactylus in captivity." In The Evolution and Ecology of Armadillows, Sloths, and ...