
Crick and Watson's DNA Molecular Model
1953
1953
1953
1960
1959
1830 (original); 1967 (model)
circa 1956-1959
1955
1955
1957
circa 1960
1957
1961
circa 1955
1960
1951
1957
1957
1955
1957
1957
1954
1958
1951
1953
1956
circa 1953
1951
1955
1951
1956
1959
1959
1951-1953
1961
1953
1955-1960
1956
May 1953
1951-1953
1953-1960
1955
1956
1953-1958
1960
1960
1955; 1830
1955
1955
1954-1955
1959