
Crick and Watson's DNA Molecular Model
1953
1953
1953
1949
1918-1920
1934
1918
1920-1950
1948-1953
1935
1920-1925
1942
1950-1952
1952-3
1920-1950
1945
circa 1919
1951
1940
1915-1925
1830 (original); 1967 (model)
1925-1935
1925-1935
1919
1928
1920-1950
1920-1950
1946-1950
1940
1923
1940-1950
1948-1950
1945
1921-1931
1953
1935
1927
1917
1953
1936
1946
1950-1953
1926
1951-1953
1920
1915-1918
1930-1940
1947
1943
1938
1930-1950