
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1901-1910
1905
1934
1897
1935
1951
circa 1910
1903
1948-1953
1950-1952
1918
1903
1936
1935
1942
1951-1953
1918-1920
1919
1920-1950
1897-1898
1920-1930
1909-1910
1949
1901-1930
1907
circa 1919
1920-1950
1948-1950
after 1903
1950
1899-1919
1915-1918
circa 1897
1920-1925
1953
1953
1945
1914-1918
1901-1930
1936
1946
1921-1930
1911
1897
circa 1900
1901-1930
1920-1940