
Crick and Watson's DNA Molecular Model
1953
1953
1953
1969-1970
1997
1969
1999
1949
1988
1976-1979
1976
1955
1960
1999
1951
1960
1984-1986
1953
1942
1948-1953
1955
1990-1997
1957
1999
circa 1956
1992-1994
1945-1955
1995
1943
circa 1956-1959
circa 1980
1975
1964
1985
1980-1990
1985
1970-1979
1976-1982
1999
1963
1999
1973
1979
1940
1969
1960
1999
1960
1951-1953
1953
1959