Crick and Watson's DNA Molecular Model
1953
1953
1946
1942
1947
1955
1946-1950
1948
1980-1950
1946
1953
1945-1955
1950
1950
1949
1944
1950-1953
1951
1946
2000-100 BCE
circa 1950
1940-1944
1941-1950
1945
1948
1945
1952
1946
1940-1949
1950-1951
1942
1943
1940-1950
1951
1951-1953
1946-1948
1948-1953
1953
1946
1943
1948
1951
1949
1948
1955
1955
1955
1945
1940
1950-1953
circa 1955