
Crick and Watson's DNA Molecular Model
1953
1953
1953
1951
1948-1953
1950-1952
1942
1951-1953
1949
1948-1950
1950
1953
1946
1953
1945
1948
1940
1949
1940-1945
circa 1939
1946-1950
1839 (original); circa 1988 (replica)
1943
1948-1953
1940-1950
1948
1946
1943
1948
1950
1938
1938
1950
1951
circa 1942
1952
1954
1952
1954
1952
1954
1952
1945
1939-1945
1951
1947
1951
1953
circa 1950
1945
1938