
Crick and Watson's DNA Molecular Model
1953
1953
1953
1955
1951
1953
1955
1957
circa 1956
circa 1956-1959
1951-1953
1953
1959
circa 1956
1952-3
1955
1955
1957
1957
circa 1955
1957
1958
1956
1952
1959
1959
1954
1952
1957
1954
1952
1954
1957
1959
1956
1957
1959
1956
1959
1957
1952
1957
2000-100 BCE
1951
1955
circa 1955
1955
1951
1953
1955
1953-1958