Year: 1930 | 1931 | 1932 | 1933 | 1934 | 1935 | 1936 | 1937 | 1938 | 1939

In the 1930s, key discoveries are made about the fissioning of atoms by Enrico Fermi, Otto Hahn, Fritz Strassmann and Lise Meitner. These discoveries lay the groundwork for the development of nuclear weapons in the next decade.

Year: 1930 | 1931 | 1932 | 1933 | 1934 | 1935 | 1936 | 1937 | 1938 | 1939