Ocean waves are easy on the eyes, but hard on the brain. How do they form? How far do they travel? How do they break? Those magnificent waves you see crashing into the shore are complex. “I’ve often asked this question,” the eminent wave scientist Walter Munk told MIT Professor Stefan Helmreich several years ago. “If we met somebody from another planet who had never seen waves, could [they] dream about what it’s like when a wave becomes unstable in shallow water? About what it would do? I don’t think…