Larisa DeSantis, Vanderbilt University (IMAGE) Vanderbilt University Caption This is Larisa DeSantis at the La Brea Tar Pits studying the dental wear on fossil teeth of cougars, saber-tooth cats and American lions. Credit Blaine Schubert 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.