Our Stone Age forebears chewed gum just like us—except their version of “gum” was actually a tarry tree resin, and we can be sure it tasted nothing like Wrigley’s Doublemint. Samples of this birch pitch still embedded with 10,000-year-old tooth marks were discovered in Sweden several decades ago, but a recent study has revealed more about what the prehistoric teenagers ate and other activities they did with their teeth. The study, published last week in the journal Scientific Reports, says the gum unearthed in the ‘90s at an archaeological site…
