
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1960
1934
1949
1920-1950
1955
1919
1918
1935
1915-1925
circa 1919
circa 1956-1959
1960
1953
1942
1948-1953
1959
1957
1945
1920-1950
1920-1950
1918-1920
1951
1960
1916-1918
1943
1920-1950
1935
1920-1929
1915-1918
1955
1941-1963
1934-1935
1920-1925
1958
1951-1953
1937-1960
1925-1958
1928
(1962); 1982
1921
1953
1945
1936
1929
1937-1960
1946-1950
1930-1939
circa 1956