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 claws. For a long time, ...

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 claws.Video above: ...

BOURNEMOUTH, England (Reuters) - Scientists have uncovered evidence of ancient humans engaged in a deadly face-off with a giant sloth, showing for the first time how our ancestors might have tackled ...

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 claws. For ...

Ground sloths occupied South America during the last ice age before going extinct 10,000 years ago. Scientists thought these giant creatures ate plants like their modern, tree-climbing counterparts.

Kevin Adkins, 36, happened across the find of a lifetime while hunting with his father-in-law, Tony Hager, on Mother’s Day in West Virginia. Adkins found a giant sloth skull that turned out to be at ...