"This discovery is a testament to the rich paleontological history of New York," New York State Museum's Robert Feranec said.

Sloths weren't always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge - up to 4 tons (3.6 metric tons ...

For a long time, scientists believed the first humans to arrive in the Americas soon killed off these giant ground sloths through hunting, along with many other massive animals like mastodons ...

A historic (or perhaps more accurately, prehistoric) discovery was made just under the surface of a New York homeowner’s lawn ...

Mastodons also resembled now-extinct mammoths with their long upper tusks, but were shorter and stockier. Rex Heuermann, a New York architect, is accused of killing Valerie Mack, who was last seen ...

A complete mastodon jaw was discovered in the backyard of a home in New York's Hudson Valley, marking the state's first such find in more than a decade, officials announced this week. The Stockton ...