Why You Have Cavities (And Ancient Humans Didn't)

Every morning and night, you spend two minutes scrubbing your teeth with a plastic brush because if you stop, your teeth rot. Yet for 99% of human history, our ancestors went their entire lives without a toothbrush, toothpaste, or dental floss. Most people assume Stone Age humans had mouths full of black, rotting, crooked teeth that fell out by age 25. But when archaeologists examine prehistoric skulls, they find the exact opposite: dead-straight teeth, room for all four wisdom teeth, and cavities in less than 2% of molars. In this video, Mr Lee breaks down the surprising science and history of the human mouth—from 1.8-million-year-old toothpick grooves and Stone Age flint dental drills to why farming and soft bread ruined our jaws. ⏱️ Chapters: 0:00 The 2-Minute Routine & The Caveman Teeth Myth 2:01 The 2% Mystery: Why Cavemen Rarely Got Cavities 3:37 The 2014 Morocco Study: When Teeth Started to Rot 4:35 Why Cavemen Never Needed Braces (The Shrinking Jaw) 6:17 The 1.8-Million-Year-Old Toothpick & Neanderthal Medicine 8:02 Stone Age Dentists: Flint Drills & Beeswax Fillings 9:59 Chewing Sticks, Roman Urine Mouthwash & The Sugar Trap 12:01 The Full Picture 📚 Scientific Sources & Studies Mentioned: De Groote, I., et al. (2014). Earliest evidence of caries and periapical lesions in Taforalt, Morocco. PNAS. von Cramon-Taubadel, N. (2011). Global human mandibular variation reflects differences in agricultural and hunter-gatherer subsistence strategies. PNAS. Oxilia, G., & Benazzi, S., et al. (2015). Earliest evidence of dental caries manipulation in the Late Upper Palaeolithic (Villabruna). Scientific Reports. Bernardini, F., & Tuniz, C., et al. (2012). Beeswax as Dental Filling on a Neolithic Human Tooth (Lonche, Slovenia). PLOS ONE. Weyrich, L. S., et al. (2017). Neanderthal behaviour, diet, and disease inferred from ancient DNA in dental calculus (El Sidrón). Nature. About Mr Lee: Welcome to Mr Lee! Why do we do the things we do? Every week, we take the everyday habits, weird questions, and big myths you never think twice about and break them down using simple stick-figure animations. Subscribe so you don't miss the next story! #MrLee #AncientHumans #HistoryExplained