1. Archaeologists find oldest Scandinavian human DNA in ancient chewing gum  ABC News
  2. DNA of First Settlers of Scandinavia Gleaned from Ancient Chewing Gums  Ancient Origins
  3. Archaeologists find DNA in a 10,000-year-old piece of chewing gum  Ars Technica
  4. Ancient Wads of 'Chewing Gum' Hold the Oldest Human DNA in Scandinavia  Live Science
  5. DNA Extracted From Sweden's Prehistoric “Chewing Gum”  Archaeology
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