The Extinct Saber-Toothed Cat (IMAGE) U.S. National Science Foundation Caption The extinct saber-toothed cat, among the largest cats ever to live, roamed North and South America. Credit National Park Service Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.