Press photo (IMAGE) Karolinska Institutet Caption First author Arianna Sala, currently a post-doctoral fellow at the University of Liège, Belgium and Technical University of Munich, Germany. Credit Francesco Ciurlo 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.