The scientific wonderers at What If imagine an alternate world where giant sloths never went extinct and still roam across ...

Researchers studying a trail of fossilized footprints on a remote New Mexico salt flat have determined the tracks tell the story of a group of Ice Age hunters stalking a giant sloth. Park naturalist ...

Although it sounds like a grade-B science fiction movie, fossils show that our ancestors once hunted and fought giant ground sloths. For the first time, scientists have uncovered fossilized footprints ...

This is an archived article and the information in the article may be outdated.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. New research suggests humans lived in South ...

Imagine a sloth. You probably picture a medium-size, tree-dwelling creature hanging from a branch. Today’s sloths – commonly featured on children’s backpacks, stationery and lunch boxes – are ...

Sloth in prison -- The Great Basin now and then -- A zoologically impoverished world -- Dating an ass -- A stable of ground sloths -- Extinct mammals, dangerous plants, and the early peoples of the ...

(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 ...