Members of the Krebs Group (IMAGE) University of Bern Caption Michael Berger, co-author of the study, Ludmila Cardoso-Alvez, first author, Marie-Hélène Wasmer, and Philippe Krebs, last author. Credit Manu Friederich 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.