Lightning Can Strike Upside Down

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Upside-down lightning is just as energetic as the most powerful downward strikes. Tom A. Warner/WeatherVideoHD.tv

Lightning is far more than just a skyborne phenomenon: Remarkably, it can also form at ground level and shoot upwards. This upside-down lightning is the subject of a paper published in the Journal of Atmospheric and Solar-Terrestrial Physics, in which the strange behavior of these inverted bolts is revealed.