
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1935
1949
1935-1965
1960
1955
1918
1903
1951
1960
1920-1950
1907
1930-1960
1901-1930
1920-1925
1919
1957
1953
1948-1953
1955
1942
1934
1920-1960
1918-1920
1899-1919
circa 1956
1937
1915-1925
1943
1945-1955
1925-1935
1909-1910
1935-1945
1897
circa 1956-1959
1934-1935
1920-1925
1964
1903
1951-1953
1953
1901-1910
1959
1920-1950
1921-1930
circa 1900
1940
circa 1897