Crick and Watson's DNA Molecular Model
1953
1953
1942
1955
1956
1946
1958
1945-1955
1942
1959
1952
1947
1955
1957
1946-1950
1958
1956
1958
1948
circa 1956
1980-1950
1946
1953
1945-1955
1950
1945-1958
1950
1949
1944
1950-1953
1957
1951
circa 1956
1946
2000-100 BCE
circa 1950
1940-1944
1941-1950
1945
1948
1945
1952
1946
1958
1940-1949
1957
1957
1950-1951
1942
1943
1940-1950