(Phys.org)—Archaeologists in Bulgaria have uncovered what is believed to be the remains of the oldest prehistoric town in all of Europe. The researchers believe the town existed as a salt producing settlement around the time 4700 to 4200 BC. Excavation of the site, which was first discovered in 2005, has uncovered two story homes, three meter high walls surrounding the town – and two meters thick, and a small burial ground with the remains of some of the people that used to live there.

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