Authors of the Study (IMAGE) University of Seville Caption Left to right are, José Ignacio Álvarez Francoso, Joaquín Márquez Pérez and Ismael Vallejo Villalta. 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.