Zheng Guo, Aarhus University (IMAGE) Aarhus University Caption Associate Professor Zheng Guo at the Department of Engineering, Aarhus University. Credit AU Foto Usage Restrictions May only be used with the appropriate credit 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.