Stephanopyxis -- a Cretaceous diatom (IMAGE) National Oceanography Centre, UK Caption Studying the fossilized remains of diatoms in sediments tell us a great about past climate. Credit Andrew Davies, Alan Kemp and Heiko Pälike 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.