
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1934
1935
1951
circa 1910
1948-1953
1950-1952
1918
1936
1935
1942
1951-1953
1920-1950
1918-1920
1919
1920-1930
1909-1910
1949
1920-1950
circa 1919
1948-1950
1915-1918
1920-1940
1950
1920-1925
1953
1953
1945
1914-1918
1936
1946
1921-1930
1911
1946-1950
1839 (original); circa 1988 (replica)
1948
1940
1913
1949
1935-1945
1936-1948
1925-1935
1940-1945
1915-1925
1920-1950
1943
1915-1918
1920-1950