
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1951
1949
1951
1946
1948-1953
1945
1948-1950
1839 (original); circa 1988 (replica)
1949
1830 (original); 1967 (model)
1903 (original); 1982 (model)
1990-96
1943
1950
1947
1948
1950
1955; 1830
1950
1950
1954
1949
1953
1946
1954
1951
1944
1950-1953
1952
1954
1952
1954
1952
1954
1952
1954
1951
1951
1951-1953
1946-1948
1938 and 1951
1953
1944-1945
May 1953
1951-1953
2000-100 BCE
1950-1951