To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Video 3 Movie S3. Time-lapse movie of a cell spreading on testing substrate, recorded every 10 min. Total duration, 14.2 h. Fibroblasts probe substrate rigidity with filopodia extensions before occupying an area Stephanie Wong, Wei-Hui Guo, and Yu-Li Wang PNAS. 2014. DOI: 10.1073/pnas.1412285111 Download Original Video Browse All Videos »