
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1955
1839 (original); circa 1988 (replica)
1951
1947
circa 1955
1950
1950
1948
1955
1955
1951
1948
1948-1953
circa 1955
1952
1954
1952
1954
1952
1954
1952
1951
1955
1947
1951
circa 1950
1955
1953
1954
1949
1951
1953
1954
1951
1950-1953
1955
1955
1955
1954
1951
1951
1938 and 1951
May 1953
2000-100 BCE
1950-1951
1953
circa 1950