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Nature 403, 487-488 (3 February 2000) | doi:10.1038/35000674

Lightning: Fluff balls of fire

Graham K. Hubler

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The most mysterious sort of lightning is ball lightning — glowing spheres of light that float in air. A new theory claims to explain nearly all the properties of these unusual balls of fire.

Ball lightning has been well documented since the Middle Ages as a natural phenomenon associated with thunderstorms. It is relatively rare — only about 1% of the population ever reports seeing it (Fig. 1