As I was recalling one of the Feynam lectures, I rememberd him saying that the only phenomena QED couldn't explain are the physics of the nucleus and one other that I can't remember...gravity maybe? Anyway, since QED deals with atomic particle interactions it was the nuclier one that surprised me. I sort of got the impression that he ment both QED and QM couldn't explain nuclier physics(but not sure if he was including QM). So my questions are: Does anyone know what aspects of nuclier physics are not explainable with QED? AND, was he including QM when he said that?