Glowing orbs appear during storms sometimes, and physicists still can't explain them
Ball lightning is a rare phenomenon, reported for centuries, of glowing spheres ranging from pea-sized to several meters across that drift through the air during storms and can last many seconds, far longer than an ordinary lightning flash. In 2014, Chinese researchers captured an accidental high-speed video and optical spectrum of a probable natural specimen. Laboratory experiments have produced visually similar glowing orbs, but no one has confirmed they share the same cause as the real thing.