
Crick and Watson's DNA Molecular Model
1953
1953
1953
1942
1948-1953
1955
1955
1940
1951
1946-1950
1949
1945-1955
1950-1952
1945
1951-1953
1946
1938
1948-1950
1943
1839 (original); circa 1988 (replica)
1949
1948-1953
1945
1948
1946
1955
1955
1943
1948
1957
1957
1940
1938
1947
1947
1940
1938
1955
1938
1938
1938
1940
circa 1955
1940
1950
1953
1938
1938
1950
1951
1945-1955