1415 1015 1615 1215
4700-4500BC 10000-9800BC 2700-2500BC 8600-8400BC
1818 1749 1848 1799
1884 1844 1904 1864
1000BC-100AD 9000-7000BC 1-500AD 3000-1000BC
1932 1917 1937 1927
Newton (1642-1727) Kepler (1571-1543) Leibnitz (1646-1716) Copernicus (1473-1543)
1908 1898 1912 1904
United States New Zealand Canada Netherlands
100AD 1000BC 500AD 100BC