
Crick and Watson's DNA Molecular Model
1953
1953
1953
1935
1942
1948-1953
1940
1951
1946-1950
1949
1935
1935
1950-1952
1945
1951-1953
1946
1938
1948-1950
1943
1839 (original); circa 1988 (replica)
1949
1935
1936
1948-1953
1945
1948
1946
1943
1948
1940
1938
1947
1947
1940
1938
1938
1938
1935
1938
1940
1940
1936
1950
1935
1953
1938
1938
1950
1951
1951
circa 1950