
Crick and Watson's DNA Molecular Model
1953
1953
1949
1948-1953
1959
1949
1957
1955
1950-1952
1951
circa 1956-1959
1953
2000-100 BCE
1947
1955
1955
1946
1950
1951
1955
circa 1950
1950
1948
circa 1950
1950-1951
1954
1957
1950-1953
1952
1955
1959
1959
1954
1952
1955
1957
1954
1952
1954
1957
1959
1956
1957
1959
1956
1959
1957
1952
1954
1957
1951