"The worse the weather, the better the waves." With that wild approach, surfers Alex Gray and Alex Brost chased a low-pressure system across the Midwest to the shores of Lake Superior, where icy swells spiraled, tempting any surfer brave enough to tolerate the cold. Superior Surf is a film by PranaLens about the science and thrill of catching those waves. You can follow PranaLens on Facebook here and on Instagram here.