La Brea Tar Pits scientists have successfully identified a previously unknown species to Southern California through ...

The stone tools found at the site suggest the Hualongdong inhabitants had advanced technical skills and were on the evolutionary path toward Homo sapiens. The site, only the second in China after ...

New research suggests that humans, new to the Americas, lived alongside giant ground sloths and mastodons for millennia.

Sloth bones carved into ornaments indicate humans coexisted with megafauna thousands of years earlier than previously thought ...

Sloths weren’t always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to 4 tons — and when ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground ... aged sloth bones found at Santa Elina were charred by human-made fires ...

This photo provided by researchers shows fossils at the excavation site of Arroyo del Vizcaíno in Uruguay, where researchers have found evidence suggesting human ... bones of giant ground sloths ...