
Crick and Watson's DNA Molecular Model
1953
1953
1953
1955
1956
1948-1953
1839 (original); circa 1988 (replica)
1940
1951
1938
1947
1938
1948
1938
1938
1940
circa 1955
1950
1955; 1830
1950
1955
1954-1955
1945
1940-1945
1948
1946
1949
1940
1955
1957
1950-1953
1955
1951
1943
circa 1953
1948
1950-1952
1957
1939-1955
1940-1950
1938 and 1951
2000-100 BCE
1940-1944
1942
1941-1950
1948-1953
1942
1939-1945
1937
1954
1949