Image 4 (IMAGE) University of Bristol Caption Computed fluid dynamic simulations of the flow of water over a digital model of Tujiaaspis vividus, viewed from below Credit Zhikun Gai Usage Restrictions Once with release 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.