Particle swirl (IMAGE) University of Konstanz Caption In order to form a swirl, an active particle (in red) must sense the positions and orientations of neighbours within its field of vision and move accordingly. Credit Tobias Bäuerle 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.