4,000-year-old structure found in Ohio Bronze Age gold spirals discovered in Denmark Oldest dentistry found in 14,000-year-old tooth Norwegian iron helped build Iron Age Europe New geoglyphs found in Peru Footprints in Canada may be oldest in North America Bronze Age food discovered at prehistoric settlement Chinese Bronze Age cemetery raises questions over sacrificial links Evidence of man-made pollution in ancient times Early European modern human had close Neanderthal ancestor New Australopithecus relatives found, or are they a new species? South Africans using milk-based paint 49,000 years ago Digging a prehistoric hillfort in Wales Chalcolithic flint workshop found in Bulgaria Excavation begins at England's Marden Henge m.deoxy.org