Fossil Ammonite (image) Ruhr-University Bochum Share Print E-Mail Caption Using high-resolution X-ray radiation, Bochum-based researchers study extinct marine creatures. Depicted here is a fossil ammonite. Credit RUBIN, image: René Hoffmann Usage Restrictions Copyright notice has to be included. Share Print E-Mail 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.