Crick and Watson's DNA Molecular Model
1953
1953
1934
1949
1936
1940-1945
1920-1930
1909
1988
1951
1965
2021
1890-1900
1970
1941
1965-1970
2024
1995-2000
about 2002
1969
1935-1945
1937
1931-1940
1928-1930
1953
1991
1925
1950
2015
circa 1980
1993
1945
1995-1996
1960
1971
1987
1998
1945-1955
1950-1952
1940-1945
1942-1945
2001-2006
1920-1930
1930s
1921
1971-72
1931-1940
1997
1957-1988
1999-2003
1940-1945