Crystal Grain Boundaries (IMAGE) Washington University in St. Louis Caption Using atomic-resolution electron microscopy, Arashdeep Singh Thind, a graduate student in Rohan Mishra's lab, studied grain boundaries in crystals (see arrows). Credit Washington University in St. Louis Usage Restrictions Usage allowed with 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.