
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1934
1935
1951
1948-1953
1955
1950-1952
1920-1960
1936
1935
1955
1963
1960
1942
1951-1953
1935-1965
1920-1950
circa 1956
circa 1956-1959
1920-1930
1960
1949
1945-1955
1920-1950
1948-1950
1920-1940
1950
1920-1925
1953
1956
1953
1959
1945
1939-1955
1936
1946
1921-1930
1839 (original); circa 1988 (replica)
1948
1937-1960
1946-1950
1965
1940
1949
1961
1935-1945
1936-1948
1925-1935