2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/166689I discuss two of Edward Teller's contributions to nuclear physics, the introduction of the Gamow-Teller operator in beta decay and the formulation of the Goldhaber-Teller model for electric dipole transitions, in the context of efforts to understand the weak interaction and the nature of the neutrino.Talk presented at the Edward Teller Centennial Symposium; 16 pages, 5 figuresNuclear Theorytext