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

Smithsonian Magazine offers up a few other ancient creatures that could fit the bill, including Nile crocodiles, goannas, and ...

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

Research from several sites is starting to suggest that people came to the Americas earlier than once thought.

New discoveries from several archaeological sites in North and South America suggest that ancient people first arrived in the ...