
Crick and Watson's DNA Molecular Model
1953
1953
1949
1948-1953
1949
1945-1955
1957
1945
1955
1950-1952
1951
1953
2000-100 BCE
1945
1947
1955
1955
1946
1950
1951
1955
circa 1950
1950
1948
circa 1950
1950-1951
1954
1945-1955
1957
1945-1955
1950-1953
1952
1955
1954
1952
1955
1957
1954
1952
1954
1957
1956
1957
1956
1957
1952
1954
1957
1951
1947
1948