
Crick and Watson's DNA Molecular Model
1953
1953
1953
1950-1952
1952-3
1960
1830 (original); 1967 (model)
circa 1956
1951
1960
1957
1955
circa 1956-1959
1950-1960
1953
1955
1955
1954
1958
1953
1956
1950-1953
1956
1959
1951-1953
circa 1956
1960
1950
1951
1956
2000-100 BCE
1953-1958
1955
1955
circa 1955
1957
1957
1960
1950
1960
1960
1953
1960
1950
1951
1957
1957
1955
1951
1955; 1830
circa 1950