2 (IMAGE) University of Bern Caption Laetitia Delrez, Gastwissenschaftlerin an der Universität Genf, jetzt an der Universität Lüttich, Belgien Credit © ULiege/JLWertz 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.