Wrinkly impact —Maxime Inizan, Finn Box, Alfonso Castrejón-Pita & Dominic Vella, University of Oxford

When a solid sphere hits an elastic sheet floating on the surface of water, wrinkles form and a capillary-like ripple propagates. The ripple propagates and the wrinkles grow with time due to an interplay between the elasticity of the sheet and the inertia of the fluid.