May 1939 – Francis Perrin Introduces the Concept of the Critical Mass of Uranium Required to Produce a Self-Sustaining Release of Energy by VNEC Staff | May 1, 1939 | Timeline
January 1939 – Lise Meitner and Otto Frisch, Working Under Niels Bohr, Calculate the Energy Release from Fission by VNEC Staff | Jan 1, 1939 | Timeline
1938 – Otto Hahn and Fritz Strassmann Demonstrate Atomic Fission by VNEC Staff | Dec 17, 1938 | Timeline
1905 – Albert Einstein Suggests The Equivalence Between Mass and Energy by VNEC Staff | Jan 1, 1905 | Timeline
