After studying with Niels Bohr and Max Born, he taught at Hamburg and, finally, Zurich. His formulation in 1925 of the Pauli exclusion principle explained the electronic make-up of atoms, including the periodic table. For this work he was awarded the 1945 Nobel Prize for physics. In 1930 he predicted the existence of the neutrino, which was finally discovered in 1956 by Clyde Cowan (1919–74) and Frederick Reines (1918–98). He also made many other contributions to quantum field theory, including the CPT theorem and the spin–statistics theorem and wrote influential early accounts of quantum mechanics and relativity theory.