
Crick and Watson's DNA Molecular Model
1953
1953
1959
1957
1960
1955
1951
circa 1956-1959
1953
2000-100 BCE
1955
1955
1961
1960
1960
1951
1955
1960
1954
1960
1957
1952
1955
1959
1959
1954
1952
1961
1960
1955
1960
1957
1954
1952
1954
1957
1961
1960
1961
1959
1956
1957
1959
1956
1959
1957
1952
1954
1960
1961
1957