
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1940
1934
1955
1957
1936
1945-1955
1935
1947-1958
1955
1955
1936
1945
1949
1945-1948
1949
1951
1950
1948-1953
1950
1947
1935
1930
circa 1930
circa 1955
circa 1942
1958
1956
1945
1931
1955
1947
circa 1930
1955
1935
1940
1934-1935
1932-1936
2000-100 BCE
1945-1955
1927
1931
1930-1931
1928
1934
1937
1937
Before 1932