
Crick and Watson's DNA Molecular Model
1953
1953
1953
1935
1951
1948-1953
1955
1950-1952
1936
1951-1953
1935
1955
1942
1949
1945-1955
1948-1950
1950
1945
1939-1955
1953
1936
1946
1953
1948
1839 (original); circa 1988 (replica)
1943
1936
1946-1950
1940
1949
1936-1948
1940-1945
circa 1939
1935-1945
1948-1953
1940-1950
1948
1946
1955
1955
1943
1948
circa 1955
1950
1938
1938
1950
1935
1951
1955
circa 1955