
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1951
1949
1951
1942
1946
1948-1953
1938-1940
1945
1948-1950
1839 (original); circa 1988 (replica)
1949
1830 (original); 1967 (model)
1903 (original); 1982 (model)
1990-96
1943
1950
1938
1947
1938
1948
1938
1938
1940
1950
1955; 1830
1950
1950
1937
1954
1949
1953
1946
1937
1954
1951
1944
1950-1953
circa 1942
1952
1954
1952
1954
1952
1954
1952
1954
1951