New research from several sites is starting to suggest that people came to the Americas earlier — perhaps far earlier — than ...

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

This prehistoric treasure was accompanied by bone fragments, including a piece of rib and a toe fragment. Aware of the value of his discovery, the man immediately contacted ... This jawbone is the ...

Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense claws. For a long time, scientists believed the first humans to arrive in ...