
Crick and Watson's DNA Molecular Model
1953
1953
1953
1969-1970
1997
1969
1960
1920-1960
1920-1950
1920-1925
1934
1976-1979
1988
1992-1994
1923
circa 1956-1959
1955
1948-1953
1920-1950
1920-1950
1963
1951
1949
1974
1995
1984-1986
1996
1965
1985
1975
1931
1951
1942
1956
circa 1972
1960-1970
1964
1980-1990
1925-1958
1935-1965
1946
1959
1976-1982
1948-1953
1955
1996
1979
1969
1990-1997
1930-1931
1957