A New Explanation for One of the Strangest Occurrences in Nature: Ball Lightning

Every so often, given the proper conditions, a small and roughly spherical piece of the atmosphere around us will briefly catch fire. As they are best viewed late into the night and have no obvious natural explanation, it’s perhaps no wonder they’ve inspired a rich mythology. Names for balls of fire include ignis fatuus, will-o’-the-wisp, ghost lights, and ball lightning. They’ve been said to hover above graves, dance along the banks of rivers, signal the imminent arrival of an earthquake, and stalk the aisles of airplanes. Even today, we don’t have a crystal-clear understanding of how they form and do what they do.

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