(IMAGE) Universitat Pompeu Fabra - Barcelona Caption Lorena Galera López, Alba Navarro Romero and Andrés Ozaita Mintegui, UPF leading researchers Credit Authors of the research Usage Restrictions No restrictions. License CC0 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.