To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S4. Single molecule movie, related to Fig. 1. Time-lapse movie of a spindle labeled with low density of fluorescent tubulin. Frame rate 1/2.1s; 50× speed. Physical basis of spindle self-organization Jan Brugués, and Daniel Needleman PNAS. 2014. 111:18496-18500 DOI: 10.1073/pnas.1409404111 Download Original Video Browse All Videos »