
Crick and Watson's DNA Molecular Model
1953
1953
1953
1934
1948-1953
1839 (original); circa 1988 (replica)
1940
1951
1938
1947
1938
1948
1938
1935
1938
1940
1928
1950
1932
1955; 1830
1950
1936
1935
1945
1932
1926
1934
1940-1945
1948
1946
1949
1940
1950-1953
1951
1943
circa 1953
1948
1950-1952
1935-1945
1940-1950
1935
1927-1929
1930-1940
1935
1938 and 1951
1929-1935
1926
1936
2000-100 BCE
Before 1932
before 1928