
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1920-1950
1940
1934
1918-1920
1919
1920-1925
1936
1920-1950
1935
1918
1936
1945
1949
1945-1948
1920-1950
1949
1951
1925-1926
1950
1948-1953
1950
1947
1935
1930
circa 1930
circa 1942
1923-1939
1945
1920-1950
1920-1950
1931
1947
1924
circa 1930
1935
1940
1918
1934-1935
1932-1936
2000-100 BCE
1927
1931
1930-1931
1928
1921
1934
1937