
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1839 (original); circa 1988 (replica)
1940
1951
1938
1947
1938
1948
1938
1938
1940
1940
1936
1950
1955; 1830
1950
1951
1949
1940-1945
1945
1948
1946
1943
1948
1950
1937
1949
1951
1953
1946
1942
1937
circa 1953
1951
1944
1950-1953
circa 1942
1950-1953
1950-1952
1952
1952
1952
1952
1951
1951
1951-1953
1939
1936