‘Microlightning’ between tiny methane bubbles may explain ghostly glow of will-o’-the wisps

Scientists have long suspected that the will-o’-the-wisp’s spectral glow came from a chemical reaction in gases released by decaying organic matter. Methane, which is odorless, colorless and highly flammable, is one such gas. Swamp gas is about two-thirds methane, and when methane reacts with oxygen...

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