Mesolithic chewing gum reveals ancient diet and dental woes
About 10,000 years ago, a group of hunter-gatherers were hanging out in what is now south-western Sweden chewing pieces of birch tar. New analysis of that substance reveals that they may have had very modern dental issues.The birch tar samples, which were likely chewed to create a kind of glue, were first excavated in the 1990s in Huseby Klev, Sweden. While they've been studied before, a team of researchers, led by Emrah Kırdök from Mersin University in Turkey, developed cutting-edge methods to analyze the ancient DNA…