Two kilns dating back to the Copper Age 7,000 years ago and dozens of artifacts have been unearthed in northeast Bulgaria, another clue to life in the area which was home to one of the world’s oldest civilizations. The furnaces which archaeologists estimate were made between 4800 and 4600 BC appear to have come from … Continuă lectura 7,000 year-old kilns from Copper Age dug up in northeast Bulgaria