Giant Ground Sloth. Image by Nobu Tamura email:[email protected] http://spinops.blogspot.com/, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via ...

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 ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many other massive animals like mastodons ...

As Odess interprets them, one set of tracks shows "a giant ground sloth going along on four feet" when it encounters the footprints of a small human who has recently dashed by. The huge animal ...

But new discoveries suggest that "humans were existing alongside these animals for at least 10,000 years, without making them go extinct."Some of the most tantalizing clues come from an archaeological ...