Stephan Winkler, University of Vienna (image) University of Vienna Share Print E-Mail Caption Isotope Researcher Stephan Winkler, University of Vienna, is shown in front of the "Vienna Environmental Research Accelerator" (VERA). Credit Copyright: Universität Wien Usage Restrictions The image may only be used with appropriate caption or credit. 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.