Polarization Arrows (IMAGE) DOE/Argonne National Laboratory Caption Tracing paths along the depicted polarization arrows — like tracing paths of hairs in the swirl on the back of a head — produces the lines in the simulations. Credit Image by Yuri Tikhonov, University of Picardie and Russia’s Southern Federal University, and Anna Razumnaya, Southern Federal University 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.