
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1955
1951
1839 (original); circa 1988 (replica)
1947
circa 1955
1950
1950
1948
1955
1955
1951
1948
circa 1955
1952
1954
1952
1954
1952
1954
1952
1951
1955
1947
1951
circa 1950
1955
1953
1954
1949
1951
1953
1954
1955
1955
1955
1954
1951
1951
1950-1951
1950
1948
1955
1955
1955
1950
1954-1955
circa 1953