
Crick and Watson's DNA Molecular Model
1953
1953
1953
1942
1948-1953
1945
1918-1920
1935
1910
1935
1920-1925
1917
1934
1919
1950-1952
1920-1940
1920-1950
circa 1915
1909-1910
1946-1950
1936
1949
1949
1915-1925
1920-1950
1920-1950
1948-1950
1948-1953
1945
1926
1948
1946
1943
1948
1931
1911
circa 1920
1927
1940
1910
1927
1938
1915
1920
1915
1947
1947
1932-1942
1924
1910
1940