
Crick and Watson's DNA Molecular Model
1953
1953
1953
1956
1955
1839 (original); circa 1988 (replica)
circa 1955
1955
1957
1955
1957
circa 1955
1956
1954
1957
1954
1954
1957
1956
1957
1956
1957
1957
1955
1955
1957
1953
1954
1953
1954
1955
1955
1955
1954
1956
1956
1955
1955
1957
1957
1955
1957
1957
1954-1955
circa 1953
1955; 1830
1953
1956
1957
May 1953
2000-100 BCE