
Crick and Watson's DNA Molecular Model
1953
1953
1953
1942
1955
1948-1953
1955
1946-1950
1940
1951
1949
1945-1955
1945
1950-1952
1946
1951-1953
1938
1948-1950
1943
1839 (original); circa 1988 (replica)
1936
1949
1948-1953
1945
1948
1946
1955
1955
1943
1948
1940
1938
1947
1947
1940
1938
1955
1938
1938
1938
1940
circa 1955
1940
1936
1950
1953
1938
1938
1950
1951
1945-1955