
Crick and Watson's DNA Molecular Model
1953
1953
1953
1942
1948-1953
1903
1945
1918-1920
1935
1901-1930
1910
1935
1920-1925
1917
1934
1955
1919
1950-1952
1920-1940
1920-1950
circa 1915
1909-1910
1901
1946-1950
1903
1936
1907
1949
1949
1905
1945-1955
1915-1925
1920-1950
1920-1950
1948-1950
1948-1953
1945
1926
1948
1946
1955
1955
1943
1948
1957
1931
1911
circa 1920
1927
circa 1900
after 1903