
Crick and Watson's DNA Molecular Model
1953
1953
1953
1934
1935
1951
1948-1953
1955
1950-1952
1936
1935
1955
1960
1942
1951-1953
circa 1956
circa 1956-1959
1960
1949
1945-1955
1948-1950
1950
1956
1953
1959
1945
1939-1955
1936
1946
1953
1937-1960
1946-1950
1839 (original); circa 1988 (replica)
1948
1925-1935
1943
1935-1945
1936
1940
1949
1936-1948
1940-1945
1930-1960
1930-1950
circa 1939
1948-1953
1933-1959
1940-1950
1960
1926
1948