
Crick and Watson's DNA Molecular Model
1953
1953
1953
1920-1950
1934
1935
1951
1948-1953
1955
1950-1952
1920-1960
1936
1963
1960
1942
1935
1955
1951-1953
1920-1950
circa 1956
circa 1956-1959
1960
1920-1930
1949
1945-1955
1920-1950
1948-1950
1950
1956
1953
1959
1936
1946
1921-1930
1920-1925
1953
1920-1940
1945
1939-1955
1937-1960
1948
1936
1940
1949
1961
1936-1948
1940-1945
1920-1950
1920-1950
circa 1939
1946-1950