Dixon, Zheng, Lee, Liu (IMAGE) Salk Institute Caption Top from left: Jesse Dixon and Dongsung Lee Bottom from left: Zhi Liu and Ye Zheng Credit Salk Institute Usage Restrictions With credit and related coverage License Original 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.