
Crick and Watson's DNA Molecular Model
1953
1953
1953
1956
1948-1953
1955
1951
1839 (original); circa 1988 (replica)
1947
circa 1955
1950
1960
1950
1948
1950-1960
1950-1959
1955
1957
1950-1959
1955
1951
1950-1960
1948
1957
circa 1960
circa 1955
1958
1956
1960
1952
1959
1959
1954
1952
1960
1960
1957
1954
1952
1954
1957
1960
1959
1956
1957
1959
1956
1959
1957
1952
1957