볼 라이트닝!?
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도통 알 수 없는 기이한 현상이라고 한다....
“Ball Lightning ? Ball lightning?is an unexplained and potentially dangerous?atmospheric electrical phenomenon.? The term refers to reports of luminescent, spherical objects that vary from pea-sized to several diameter. Scientific data on natural ball-lightning is scarce, owing to its infrequency and unpredictability. Though usually associated with thunderstorms, the phenomenon lasts considerably longer than the split second flash of a lightning bolt.
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