Long before today’s tree-dwelling sloths, a 4-ton giant roamed South America — and it may have stood and fought like a bear.

A 400,000-year-old giant sloth femur was discovered in Argentina, preserving rare muscle marks that reveal how these Ice Age ...

In a rare and exciting find, road crews in Lubbock, Texas, stumbled upon a prehistoric creature fossil while working on the ...

Add Yahoo as a preferred source to see more of our stories on Google. Ancient sloths lived in trees, on mountains, in deserts, boreal forests and open savannahs. These differences in habitat are ...

Add Yahoo as a preferred source to see more of our stories on Google. Harlan's ground sloth fossil skeleton excavated and displayed at the La Brea Tar Pits in Los Angeles. Larisa DeSantis A two-toed ...

SAO PAULO — 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 ...

Sloth Month? Now there’s something we can (very slowly) get behind. This winter, the Children’s Natural History Museum in ...

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 ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Imagine a sloth. You probably picture a medium-size, tree-dwelling creature hanging ...