
Crick and Watson's DNA Molecular Model
1953
1953
1969-1970
1901-1930
1953
1969
1920-1950
1934
1976-1979
1920-1960
1918
circa 1900
1935
1926-1932
1963
1969
1915-1918
1920-1925
1960
1976
1948-1953
1925-1958
(1962); 1982
1901-1910
1935-1965
1959
1918-1920
1919
1912
1910-1926
1909-1910
1949
1949
1988
1925-1935
1900-1910
1923
1915-1925
1920-1950
1920-1950
1930-1960
1984-1986
1920-1950
1915
1903
c.1912
1907
1830 (original); 1967 (model)
circa 1956-1959
1948-1950
1960