
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1940
1951
1839 (original); circa 1988 (replica)
1947
1950
1950
1948
1946
1951
1943
1948
circa 1942
1952
1954
1952
1954
1952
1954
1952
1945
1951
1947
1951
circa 1950
1940
circa 1938
1938
1953
1938
1954
1949
1951
1953
1946
1942
1954
1944
1954
1951
1951
1950-1951
1943
1940-1949
1946
1950
1938
1938