
Crick and Watson's DNA Molecular Model
1953
1953
1953
1956
1955
1839 (original); circa 1988 (replica)
1951
circa 1955
1950
1960
1950
1950-1960
1950-1959
1955
1957
1950-1959
1955
1951
1950-1960
1957
1962
circa 1960
circa 1955
1962
1958
1956
1960
1952
1962
1959
1959
1954
1952
1961
1962
1960
1960
1957
1962
1954
1952
1954
1962
1957
1961
1960
1961
1959
1956
1957
1959