
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1956
1948-1953
1955
1934
1920-1950
1920-1950
1940
1951
1839 (original); circa 1988 (replica)
1923
1947
1935
circa 1955
1950
1922
1950
1935
1948
1946
1955
1955
1951
1943
1948
1920-1929
1931
1930
circa 1930
circa 1955
circa 1942
1956
1925
1928
1952
1954
1952
1954
1952
1954
1956
1956
1952
1923-1939
1945
1920-1950
1920-1950
1951