
Crick and Watson's DNA Molecular Model
1953
1953
1953
1934
1935
1948-1953
1959
1949
1949
1830 (original); 1967 (model)
1948-1950
circa 1956-1959
1948
1946
1950-1959
1955
1950-1959
1955
1943
1948
1957
1957
1947
1935
circa 1955
1935
1934
1950
1950
1935
1951
1940
1957
1957
1955
1957
1957
1934
1931
1954
1949
1958
1951
1953
1942
1956
circa 1953
1951
1944
1950-1953
1955