Why Do Humans Snore? An Evolutionary Biologist Explains What’s Happening To Your Airway

InnovationScienceWhy Do Humans Snore? An Evolutionary Biologist Explains What’s Happening To Your AirwayByScott Travers,Contributor.Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world.Follow AuthorMay 31, 2026, 08:30am EDT--:-- / --:--This voice experience is generated by AI. Learn more.This voice experience is generated by AI. Learn more.You snore because your airway was redesigned for language. That structural trade-off has been with us for 40,000 years.gettySnoring is one of the most common things a human body does during sleep, and one of the least understood. Most people who snore chalk it up to sleeping on their back or having had one too many drinks. But the real explanation is more interesting than either, and it reaches back to the moment our ancestors started talking. To understand snoring, we first need to appreciate how remarkable it is that we breathe quietly at all. What Causes A Person To Snore?Every time you draw air into your lungs, it travels through the pharynx: a soft-walled, muscular tube at the back of your throat that doubles, improbably, as a passageway for both food and air. What keeps this tube from collapsing like a deflated straw is a network of pharyngeal dilator muscles: the genioglossus (the main muscle of the tongue), the soft palate tensors and a suite of supporting players that collectively hold the airway open with each breath.During wakefulness, these muscles receive strong neural drive from the brainstem, keeping the airway patent and the airflow laminar. Sleep, however, changes the equation. As you transition from wakefulness to sleep, this excitatory drive decreases substantially. In most people, the muscles relax just enough to allow normal breathing. In others, tens of millions of them, the airway narrows, airflow becomes turbulent and the soft tissues of the palate and uvula begin to oscillate. That oscillation is what we know today as sn...