
Crick and Watson's DNA Molecular Model
1953
1953
1953
1956
1948-1953
1955
1934
1839 (original); circa 1988 (replica)
1940
1951
1947
1935
circa 1955
1950
1950
1935
1948
1946
1955
1957
1955
1951
1943
1948
1957
1931
1930
circa 1930
circa 1955
circa 1942
1956
1925
1928
1952
1954
1952
1957
1954
1952
1954
1957
1956
1957
1956
1957
1952
1957
1945
1951
1955
1927