
Crick and Watson's DNA Molecular Model
1953
1953
1953
1955
1963
1956
1839 (original); circa 1988 (replica)
1951
1969
1950-1969
1961
circa 1955
1950
1960
1955-1965
1960
1960
1968
1964
1955; 1830
1950
1965
1955
1959
1954-1955
1968
1961-1962
1949
1950-1960
circa 1969
1950-1959
1955
1957
1960
1950-1959
1950-1953
1962
1955
1951
circa 1953
1950-1960
1953-1958
1950-1952
1957
1962
1969
1949-1966
1955-1965
circa 1960
1938 and 1951
(1962); 1982