Microswimmers (image) Max-Planck-Gesellschaft Share Print E-Mail Caption Light-driven microswimmers: the material of the swimming body, which measures just under one millimeter in length, is chosen so that it changes shape when exposed to green light. This causes wave-shaped protrusions to form along the swimmer and drive it in the opposite direction when light patterns move over its surface. Credit Alejandro Posada/ Max Planck Institute for Intelligent Systems, Stuttgart Usage Restrictions None Share Print E-Mail 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.