Huge tunnels under southern Brazil and northern Argentina were potentially made by giant, Ice Age sloths for refuge and rest ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. SAO PAULO (AP) — Sloths weren’t always ...

Massive underground tunnels discovered across South America are not human-made. Scientists now believe extinct giant ground ...

WOODSIDE, Calif. (AP) — Nestled in forests around the world, a gentle army of giant wooden trolls want to show humans how to live better without destroying the planet. The Danish recycle artist Thomas ...

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 ...