Crick and Watson's DNA Molecular Model
1953
1953
1780-1850
1920-1960
1948-1953
1919
1999
1999
1990-1998
1801-1900
1751-1800
1998
1990-1997
2012
1853-1857
1885 - 1930
1902-1917
1999
1862
1860
1963
1935
1985-1989
1744-1774
1893
1675-1679
1901-2000
1999
1964
1999
circa 1861
1775-1785
1900-1920
1955
1999
1995-1999
1829
1801-1838
1760-1775
1897
1860
after 1903
1947-2003
1874-1902
circa 1848
2000-2002
1870
1899