To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S2. A time lapse video recording showing the propagation of ice on the serrated surface under forced convective conditions. The experiment was performed over one hour and video playback was accelerated 100×. The experimental conditions are outlined in the caption for Fig S10. Frost-free zone on macrotextured surfaces Yuehan Yao, Tom Y. Zhao, Christian Machado, Emma Feldman, Neelesh A. Patankar, and Kyoo-Chul Park PNAS. 2020. 117:6323-6329 DOI: 10.1073/pnas.1915959117 Download Original Video Browse All Videos »