Skeleton of the giant ground sloth (Megatherium americanum)/Source: Wikimedia commons Over 100 species of giant ground sloths lived throughout North, Central, and South America, ranging in size from the formidable Megatherium americanum which towered 3.5 meters tall (12 feet), and weighed up to 4 tons, to the considerably smaller 90-kg (200-lb) Cuban Megalocnus. Like bears and anteaters, they had the ability to stand on their hind legs, making them the largest bipedal mammals to have existed. These ancient ancestors of modern-day sloths truly lived up their name.
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