
Crick and Watson's DNA Molecular Model
1953
1953
1949
1948-1953
1959
1935
1949
1945-1955
circa 1958-1963
1957
1939-1955
1945
1960
1942
1935
1955
1963
1950-1952
1951
1938
1940
1938
circa 1956-1959
1953
2000-100 BCE
1945
1947
1940
1955
1955
1961
1942
1946
1938-1940
1940
1960
1950
1938
1938
1960
1951
1955
circa 1950
1950
1948
1940-1945
1950-1960
1940-1949
1942
1950-1960
circa 1950