Researchers (IMAGE) University of Warwick Caption From left to right Jonathan Barrios-Rivera, Martin Wills, Yingjian Xu (Andy). Credit University of Warwick Usage Restrictions Only to be used in conjunction with this story 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.