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The Harmsworth Encyclopaedia 1930s / 1940s -
Social history showing an illustration of a Skeleton of Megatherium 1900s. Megatherium from the Greek mega [μÎγας], meaning `great`, and therion [θηÏίον], `beast` was a genus of elephant-sized ground sloths endemic to South America, sometimes called the giant ground sloth, that lived from the Early Pliocene through the end of the Pleistocene.