Javier Saavedra, University of Seville (IMAGE) University of Seville Caption This is Javier Saavedra, main researcher of the study. Credit University of Seville 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.