j-m By missnicholls2016 Apr 27, 1900 To explain black-body radiation Jul 27, 1905 Discovered nuclear transmutation when they found that radioactive thorium was converting itself into radium through a process of nuclear decay. Apr 30, 1911 Determined the equivalence of matter and energy Apr 27, 1924 quantum mechanics provides the foundation for Bose–Einstein statistics, the theory of the Bose–Einstein condensate, and the discovery of the boson. Apr 27, 1925 Outlined the "Pauli exclusion principle" which states that no two identical fermions may occupy the same quantum state simultaneously