Counterfeit silver in early Middle East; climate change ended Central Asian civilizations; more skulls for Aztec tower of skulls; high craftsmanship in Scottish cross
Hoards of counterfeit silver show how rulers propped up currency in early Middle East
Climate change, not Genghis Khan, caused the end of Central Asian kingdoms
More skulls found from Aztec tower of skulls in Mexico City
Scottish cross from Viking-era hoard shows craftsmanship fit for a king