
Crick and Watson's DNA Molecular Model
1953
1953
1953
1955
1956
1934
1948-1953
1839 (original); circa 1988 (replica)
1940
1951
1953-1958
1938
1947
1938
1948
1938
1935
1938
1940
circa 1955
1935
1940
1936
1934
1950
1955; 1830
1950
1935
1951
1939-1955
1955
1949
1954-1955
1940-1945
1945
1948
1946
1955
1955
1943
1948
1957
1957
1935-1945
1950
1956
1934-1935
1934
1937
1954
1949