
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1940
1955
1945-1955
1955
1955
1945
1949
1945-1948
1949
1951
1950
1830 (original); 1967 (model)
1948-1953
1950
1947
circa 1955
circa 1942
1956
1945
1955
1947
1955
1940
2000-100 BCE
1945-1955
1956
1940
1955
1950-1953
1948
1946
1945
1945
1940
1943
circa 1953
1951
1950-1952
1949
1940-1945
1948
1950
1948
1950
1955; 1830
1950
1944