To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S2. Movie clip of the cone–beam system being dropped into the water at 0.65 m/s. The difference in beam length shows the stable and unstable behaviors of the beam when the cone reaches two cone heights below the water surface. How seabirds plunge-dive without injuries Brian Chang, Matthew Croson, Lorian Straker, Sean Gart, Carla Dove, John Gerwin, and Sunghwan Jung PNAS. 2016. 113:12006-12011 DOI: 10.1073/pnas.1608628113 Download Original Video Browse All Videos »