Sea lion skulls (IMAGE) University of California - Santa Cruz Caption California sea lion skulls used for this study at the Ornithology and Mammalogy Collection of the California Academy of Sciences. Credit Ana Valenzuela Toro Usage Restrictions For use only with news coverage of this research License Original 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.