Newly Identified Fossil Reveals Ancient Saber-Toothed Cat That Roamed North America

Fossils long stored in a museum drawer and labeled merely 'feline' turn out to belong to an ancient, enigmatic saber-toothed cat that lived in North America more than 5 million years ago. A UC Berkeley paleontologist says the nearly complete skull clarifies how these large-fanged predators evolved before going extinct.