Cross-section of vertebrae (IMAGE) Uppsala University Caption Computed tomography image and cross-section showing internal bone structure of vertebrae from the earliest ichthyosaur. Credit Øyvind Hammer and Jørn Hurum Usage Restrictions May only be published in connection to stories about the research by Kear et al. 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.