
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1934
1918
1935
1926-1932
1915-1918
1920-1925
1948-1953
1925-1958
1959
1918-1920
1919
1949
1949
1925-1935
1923
1915-1925
1920-1950
1920-1950
1920-1950
1915
1830 (original); 1967 (model)
circa 1956-1959
1948-1950
1914
1945
1926
1948
1946
1950-1959
1955
1950-1959
1955
1943
1948
1957
1957
1953-1958
1938
1920
1947
1938
1948
1923-1948
1938
1935
1938
1940