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