Very interesting find.
https://www.sciencemag.org/news/2018/12/8000-year-old-gum-holds-surprises-about-ancient-toolmakers?utm_source=6&utm_medium=social&utm_campaign=News-from-Science-(ScienceNOW)&utm_term=SciMag&utm_content=AAAS
Gum won’t really sit in your stomach for years, but it can...