Study leader (IMAGE) University of Bonn Caption Study leader Dr. Andrea Alberti from the Institute of Applied Physics at the University of Bonn (Germany) Credit © Volker Lannert / University of Bonn Usage Restrictions Please use this image only in connection with the press release. 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.