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There is a tiny hole in every airplane window, and most passengers never notice it. It looks small and harmless, but it is actually one of the most important safety features on the plane. At 35,000 feet, the pressure inside the cabin becomes far greater than the air outside. Without that tiny hole …

There is a tiny hole in every airplane window, and most passengers never notice it. It looks small and harmless, but it is actually one of the most important safety features on the plane. At 35,000 feet, the pressure inside the cabin becomes far greater than the air outside. Without that tiny hole controlling the pressure between the window layers, the outer window could take all the stress. So the next time you look out the window on a Commercial Airplane, remember that small hole is helping