
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1934
1935
1951
1918
1948-1953
1955
1950-1952
1936
1951-1953
1935
1955
1920-1950
1918-1920
1942
1919
1949
1945-1955
1920-1950
circa 1919
1920-1930
1948-1950
1950
1915-1918
1920-1940
1945
1939-1955
1920-1925
1953
1936
1946
1921-1930
1953
1948
1839 (original); circa 1988 (replica)
1925-1935
1915-1925
1920-1950
1943
1915-1918
1930-1950
1936
1946-1950
1940
1949
1936-1948
1940-1945
1920-1950