Crick and Watson's DNA Molecular Model
1953
1953
1942
1955
1978
1936
1967
1962
1963
1956
1935
1946
1950-1960
1959-1964
1939
1975
1958
1974
1945-1955
1970
1931-1966
1961
1942
1959
1935
1967
1964
1975
1952
1947
1930-1960
1955
circa 1932
1968
1935
1937
1937
1960-1970
1938; (1838)
1974
1957
1946-1950
1957 (original); 1961 (model)
1960s
1960s
1958
1961
1961
1961
1959-1962
1937