
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1940
1934
1955
1957
1942
1936
circa 1956-1959
1935
1945-1955
1947-1958
1955
1955
1949
1955
1951-1953
1936
1945
1945-1948
1830 (original); 1967 (model)
1951
1949
1949
1951
1950
1948-1953
1950
1952-3
1948-1950
1947
1935
circa 1955
circa 1942
1958
1956
1945
1955
1947
1955
1935
1940
1934-1935
2000-100 BCE
1945-1955
1951
1945-1955
circa 1950
1938