
Crick and Watson's DNA Molecular Model
1953
1953
1953
1955
1955
circa 1956
1953
1956
1953
1839 (original); circa 1988 (replica)
1955
1955
1957
1957
circa 1955
1955
circa 1955
1956
1952
1954
1952
1957
1954
1952
1954
1957
1956
1957
1956
1957
1952
1957
1955
1953
1956
1957
2000-100 BCE
1955
1954
1955
1955
1954
1955
1957
1954
circa 1953
1956
1956
May 1953
1953
1955