
Crick and Watson's DNA Molecular Model
1953
1953
1953
1955
1839 (original); circa 1988 (replica)
1951
circa 1955
1950
1950
1955
1955
1951
circa 1955
1952
1954
1952
1954
1952
1954
1952
1951
1955
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
1955
1950
1955; 1830
1955
1955
1955