
Crick and Watson's DNA Molecular Model
1953
1953
1953
1948-1953
1839 (original); circa 1988 (replica)
1951
1947
1950
1950
1948
1946
1951
1948
1952
1952
1952
1952
1945
1951
1947
1951
circa 1950
1953
1949
1951
1953
1946
1951
1951
1950-1951
1946
1950
1948
1946
1950
1945
circa 1953
1951-1953
1946-1948
1953
1946
1951-1953
1955; 1830
1951
1950-1953
1938 and 1951
May 1953
2000-100 BCE
1953
1945
circa 1950