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Some of the clues come from an archaeological site in central Brazil, Santa Elina, where bones of giant ground sloths show signs of being manipulated by humans. Sloths such as these once lived ...

Some of the clues come from an archaeological site in central Brazil, Santa Elina, where bones of giant ground sloths show signs of being manipulated by humans. Sloths such as these once lived from ...

SAO PAULO, Brazil (AP) — Sloths weren’t always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge – up to 4 tons – and when startled, they brandished immense claws.

It has long been believed that ancient humans were responsible for the mass extinction of megafauna in the Americas. But a new discovery points to the fact that incredible extinct creatures that ...

An illustration depicting a person carving an osteoderm from a giant sloth in Brazil about 25,000 to 27,000 years ago (Julia d’Oliveira via AP) Sloths were not always slow-moving, furry tree ...

SAO PAULO (AP) — Sloths weren’t always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense ...