Simulation snapshot (IMAGE) Hong Kong University of Science and Technology Caption Simulation snapshot of a self-propelling topological defect in an active liquid crystal guided by a light pattern (shone in pink region). Credit Prof. Zhang Rui, HKUST Usage Restrictions None 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.