Scientifically speaking, ball lightning is still a yet to be explained phenomenon described as luminescent, spherical objects that vary from pea-sized to several meters in diameter. They are normally associated with thunderstorms, and are described to last considerably longer than the split-second flash of a lightning bolt. The earliest recorded reports state that the phenomenon eventually explodes and leaves behind a sulfur-like odor.
Ball lightning has appeared in various accounts over the centuries and received attention from scientists. More recently, an optical spectrum of what is purported to have been a ball-lightning event was published in January 2014 and included a video at high frame rate, while laboratory experiments have produced effects that are visually similar to this phenomenon.
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