Claus Rueffler, University of Vienna (image) University of Vienna Caption This is theoretical biologist Claus Rueffler of the University of Vienna. Credit Claus Rueffler Usage Restrictions The image may only be used with appropriate caption or credit. 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.