
Crick and Watson's DNA Molecular Model
1953
1953
1953
1918
1920-1950
1903
1920-1925
1934
1919
1907
1923
1955
1948-1953
1920-1950
1920-1950
1951
1949
1900-1920
1901-1930
1915-1925
1903
1898
1931
1917
1951
1942
1902
1899-1919
1946
1918-1920
1948-1953
1955
1915-1918
1911
1930-1931
1938-1940
1945
circa 1920
1914-1916
1948-1950
1839 (original); circa 1988 (replica)
1936
1949
1935
circa 1900
1905
1705-1737
1945-1955
1900-1910
1925-1935
1900-1910