
Crick and Watson's DNA Molecular Model
1953
1953
1953
1951
1948-1953
1955
1950-1952
1963
1960
1942
1951-1953
1955
circa 1956-1959
circa 1956
1960
1949
1945-1955
1948-1950
1950
1967
1953
1956
1953
1959
1945
1946
1967
1948
1946-1950
1965
1940
1949
1961
1839 (original); circa 1988 (replica)
1968
1943
1940-1945
1945-1965
1954-1968
1948-1953
1940-1950
1963
1960
1968
1948
1946
1950-1959
1955
1950-1959
1955
1943