
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1956
1948-1953
1955
1934
1839 (original); circa 1988 (replica)
1940
1951
1920-1950
1920-1950
1923
1947
1935
circa 1955
1910
1950
1922
1950
1913-1923
1935
1915
1948
1946
1955
1914-1920
1957
1955
1951
1943
1948
1957
1920-1929
1912
1931
1930
circa 1930
1910
circa 1955
1910
circa 1942
1956
1925
1928
1952
1954
1952
1957
1954