
Crick and Watson's DNA Molecular Model
1953
1953
1953
1956
1948-1953
1955
1839 (original); circa 1988 (replica)
1951
1947
circa 1955
1950
1950
1948
1946
1955
1955
1951
1943
1948
1948-1953
circa 1955
circa 1942
1956
1952
1954
1952
1954
1952
1954
1956
1956
1952
1945
1951
1955
1947
1951
1945-1955
circa 1950
1955
1953
1954
1949
1951
1953
1946
1942
1954
1951
1944
1950-1953