
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1945
1955
1950-1952
1946-1950
1949
1949
1945-1955
1948-1950
1948-1953
1945
1948
1946
1955
1955
1948
1947
1947
1955
1948
1955
circa 1955
1950
1953
1950
1951
1955
1954
1949
1951
1953
1946
1956
1955
1954
circa 1953
1946
1951
circa 1955
1944
1950-1953
1950-1953
1956
1945-1955
1955
1951
1955; 1830
circa 1950