The study, published in the scientific journal Proceedings of the Royal Society B, indicates that humans may have inhabited South America ... as showing "a giant ground sloth going along on ...

These massive underground tunnels, attributed to the activities of ancient giant mammals ... 2,590 kg (5,709 pounds), a single ground sloth would likely have devoted a significant portion of ...

A strange cast of ferocious predators and giant herbivores ... cumbersome sloth (Megalonyx jeffersonii). Not cute and endearing like present-day sloths in South America, these sloths were one ...