The following photos look not only exciting, they are serious science. Four students of the „Department of Chemical Engineering and Materials Science“ the University of Minnesota have tested the effect of speed on the impact of water droplets on sand similar substrates. The result was interesting results - and just damn nice pictures!
Such information allows us to construct a simple model for describing the morphology of raindrop imprints in a granular bed. Surprisingly, we found that liquid-drop impact cratering follows the same energy scaling and reproduces the same crater morphology as that of catastrophic asteroid impact cratering.