The Fallstreak Hole: The Perfect Circle in the Clouds That People Mistook for a UFO
About 5 min readA perfect circle opens in an otherwise unbroken sheet of cloud, with wisps of ice falling from its centre — a hole punched clean through the sky. For years, witnesses blamed flying saucers. The real culprit is more ordinary and more wonderful: an aeroplane, a layer of water colder than freezing, and a chain reaction in the clouds.