Eugene Wigner had so much nuclear physics. I can recall that when Niels Bohr and I were considering nuclear fission, and what the chances that a vibration in the nucleus would go far enough to go over the potential barrier to fission. Eugene was in the hospital. He'd eaten some bad oysters and had hepatitis. I stopped in to see him and told him what we were thinking about and he said you should look up the paper of -- I'll just remember it in a minute -- Polanyi, Michael Polanyi. Yes. Eugene had worked on the Theory of Molecular Reactions with Polanyi, and Polanyi had a formula for this. Bohr and I could translate that formula into the corresponding formula for nuclear physics. And it made the probability of fission proportional to the number of channels that lead over the barrier. The Channel Analysis of Fission. And that later proved to be a good guide to experimental work in the field of fission physics.