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