
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1934
1935
1951
1948-1953
1950-1952
1918
1936
1935
1942
1951-1953
1918-1920
1919
1920-1950
1920-1930
1949
circa 1919
1920-1950
1948-1950
1950
1920-1925
1953
1953
1945
1936
1946
1921-1930
1920-1940
1948
1946-1950
1940
1949
1839 (original); circa 1988 (replica)
1943
1940-1945
1936-1948
1925-1935
1920-1950
1920-1950
1930-1950
1936
circa 1939
1935-1945
1920-1950
1948-1953
1940-1950
1926
1948