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