Knot Experiment (VIDEO) University of Warsaw, Faculty of Physics This video is under embargo. Please login to access this video. Caption Swirling motion of knotted loops settling in a viscous fluid: experiment. Credit Source: P. Szymczak, UW Physics Usage Restrictions the video may only be used with the following caption: Swirling motion of knotted loops settling in a viscous fluid: experiment. (Source: P. Szymczak, UW Physics) 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.