
Crick and Watson's DNA Molecular Model
1953
1953
1953
1969-1970
1999
1997-2001
1997
1969
1960
1920-1960
1918
1920-1950
1999
2005
1920-1925
1934
1919
1976-1979
1988
1998-2002
1992-1994
1990-1998
1923
circa 1956-1959
1955
1948-1953
1920-1950
1920-1950
1963
1951
1949
1992-1999
1974
1995
1984-1986
1998
1996
1965
1985
1915-1925
2006
1998
1975
1931
1917
1951
1942
1956
circa 1972
1960-1970
1964