
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1920-1950
1940
1907
1903
1934
1915-1918
1955
1918-1920
1919
1957
1920-1925
1917
1901-1930
1936
circa 1956-1959
1920-1950
1945-1955
1935
1947-1958
1955
1918
1903
1955
1936
1901-1930
1945
1949
1945-1948
1900-1920
1775-1799 (original); 1900-1907 (model)
1920-1950
1949
1905
1951
1925-1926
1950
1830 (original); 1967 (model)
1948-1953
1950
1947
1935
1901
1930
circa 1930
1910
circa 1955
1910