Kvemo Bolnisi: From iron to copper in a 3,000-year-old workshop In southern Georgia, a 3,000-year-old workshop called Kvemo Bolnisi has long puzzled archaeologists. Early excavations in the 1950s unearthed piles of hematite (an iron oxide mineral) and slag, which led researchers to declare the site an early iron-smelting workshop. New analyses, however, rewrite that history:…