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