A farmer out walking his cattle in Argentina recently stumbled upon a family of four 20,000-year-old, car-sized armadillos in ...

Researchers identified the fossil as Glyptodon reticulatus, a megafauna species from the Late Pleistocene epoch.

For nearly 30 million years, a 2,000-pound beast known as the entelodont ruled a sweeping empire from Mongolia to what is now ...