This 5,700-Year-Old “Gum” Still Held a Human Secret

Someone chewed a lump of birch pitch 5,700 years ago and threw it away. Thousands of years later, that small black lump revealed an extraordinary record of the person who had chewed it. What looked like prehistoric “gum” preserved clues about ancestry, oral bacteria, health, and even possible traces of a recent meal. In this Ancient Humans episode, we investigate what prehistoric people were actually chewing, why birch pitch may have been placed in the mouth, and how an ordinary discarded object became an unexpected archaeological time capsule. Evidence from Syltholm in Denmark showed that a piece of chewed birch pitch preserved enough ancient human DNA for researchers to reconstruct a complete genome. Other chewed pitch samples from Huseby Klev in Sweden preserved human DNA, oral microbes, and biological traces that give us an unusually intimate glimpse into Stone Age life. The surprising part is not simply that ancient humans chewed something similar to gum. It is how much information that tiny black lump managed to preserve for thousands of years. Subscribe to Ancient Humans for evidence-based stories about prehistoric life, human evolution, archaeology, and the everyday behaviors that connect us with people who lived thousands of years before us.