A Girl Spat Out Gum 5,700 Years Ago. Scientists Just Read Her DNA From It.

[00:00:00]A girl chewed a piece of gum, then spat it out on the ground and walked away 5,700 years ago. She had no idea that one day scientists would find it, pick it up, run it through a machine, and learn almost everything about her: her face, her hair, her eyes, what she ate for her last meal, what viruses were living in her body, and where her entire family came from, all from a piece of chewing gum. This is the story of the most unlikely archaeological discovery ever made, and it started with birch bark. Here's something most people don't know about ancient humans. They chewed gum. Not the kind you find at a gas station, but actual gum made from birch bark tar. To make it, Stone Age people heated birch bark over fire until a dark, sticky, black resin oozed out.

[00:00:46]Then, they chewed it. But why? A few reasons. First, it worked as glue, the best glue they had. They used it to stick stone blades onto spear handles, to repair cracked pottery, to fix broken tools, and chewing it kept it soft and workable. Second, it may have been medicine. Birch tar is a mild antiseptic, meaning ancient humans may have chewed it to relieve toothaches, to clean their mouths, even to suppress hunger during hard times. And third, scientists believe some of them chewed it just for fun, the same reason you pop a stick of gum today, because it felt good. So, ancient humans are walking around chewing birch tar, spitting it out on the ground, and leaving it there for thousands of years. Now, here's where it gets wild. In 2019, at an archaeological site called Syltholm in southern Denmark, a researcher found a small, dark lump, about the size of a thumbnail, black-brown, slightly hardened, clearly chewed. They brought it to a paleogeneticist named Hannes Schroeder at the University of Copenhagen. His student asked him, "Can we get DNA out of this?" And he said, "We don't know. We haven't really tried.

[00:01:52]Let's find out." What happened next shocked the entire scientific world.

[00:01:57]They extracted an entire human genome from the chewing gum, the first time in history that a complete ancient human genome had been pulled from anything other than bones or teeth. From spit, from a throwaway piece of chewed-up tree resin. And suddenly, a person emerged from 5,700 years of silence. They called her Lola, and here is what the gum told them about her. Lola was female, possibly a child or young teenager, because similar gum pieces from this era often show imprints of children's teeth. She had dark skin, dark hair, and blue eyes. That last part shocked researchers because it challenges everything we assumed about ancient Scandinavians. Scientists had long believed early northern Europeans were fair-skinned with light hair. Lola turned that assumption upside down. But the gum didn't stop there. It also told scientists where Lola's people came from. Her DNA showed she was genetically more closely related to hunter-gatherers from mainland Europe than to people living in Scandinavia at the same time, meaning she or her family had migrated, traveled, moved across a continent thousands of years before borders or passports existed. And there's more. The gum contained traces of what Lola had eaten, possibly for her last meal before chewing the pitch, duck and hazelnuts.

[00:03:16]5,700 years ago, a girl sat somewhere in Denmark, ate duck and hazelnuts, and then chewed a piece of birch tar and spat it on the ground and walked away forever. But the gum remembered. Now, here's the part that genuinely shocked scientists. The gum also contained traces of the viruses and bacteria living in Lola's mouth at the time. They found the Epstein-Barr virus, the virus that causes mononucleosis. They found bacteria that cause pneumonia. They found microbes that cause gum infections, suggesting Lola may have had a toothache when she was chewing. Maybe that's exactly why she was chewing it, because it hurt and the birch tar was her painkiller. A 5,700 year-old girl with a toothache chewing prehistoric medicine and her pain was preserved in a tiny lump of dried resin for thousands of years until scientists found it and gave it a name, Lola. But this wasn't just one discovery, it kept going. In 2025, scientists analyzed 30 more pieces of ancient birch tar gum from Neolithic Europe. This time from farmers living 6,000 years ago and they found something fascinating. Male DNA was found mostly on tools, stone blades and hunting equipment. Female DNA was found mostly on pottery and ceramics, meaning ancient chewing gum may have just revealed how Stone Age men and women divided their work. Men made the weapons, women fixed the pots. All revealed not from bones, not from writing, but from chewed up gum spat on the ground. And then there's the discovery from Sweden. Scientists found eight chewed wads of birch tar at a site called Huseby Klint on Sweden's western coast, 10,000 years old. They extracted DNA from three of them, two females, one male. Three lives, three stories preserved in three pieces of ancient gum for 10,000 years waiting to be found.

[00:05:14]Here is what this all means. For most of human history, we knew ancient people existed because of their bones, their tools, their cave paintings. But bones don't tell you what someone looked like.

[00:05:24]Tools don't tell you what someone ate yesterday. Cave paintings don't carry the viruses that were living in someone's throat, but chewing gum does.

[00:05:32]Ancient DNA researchers now believe these lumps of birch tar are one of the most valuable archaeological finds in human history because they carry something bones never could, the intimate details, the last meal, the illness, the migration route, the face, the person. So next time you spit out a piece of gum, just know you are leaving behind the most complete record of yourself that has ever existed. Your DNA, your microbiome, your last meal, your viruses, your entire biological story chewed up and left on the ground, exactly like Lola did 5,700 years ago. Subscribe because every week we dig into one more reason to never underestimate ancient humans. And comment below, what do you think your chewing gum DNA would reveal about you?