Humans have shared stories about giants for thousands of years, from the cyclopes of Greek mythology to the biblical Goliath. But are these just tall tales, or have giant humans really walked this ...

Giant sloths, mastodons lived with humans for millennia in the Americas, new discoveries suggest Beginning of dialog window. Escape will cancel and close the window. It's so nice to know where we come ...

Imagine a world where colossal creatures roamed the land, coexisting with early humans. This was the reality in the Americas, where giant sloths and mastodons thrived alongside our ancestors for ...

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.Video above: ...