Dieter Hartmann (IMAGE) Clemson University Caption Dieter Hartmann, professor in the Clemson University Department of Physics and Astronomy. Credit Clemson University Usage Restrictions Editorial use only with photo credit 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.