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Volcanoes and Lightning Lightning strikes during the eruption of the Del Fuego volcano near Antigua, Guatemala. Though the environments of the planets in the solar system may seem vastly different, they are based on common scientific principles. For example, data from experiments on the Soviet Venera 11 and 12 missions indicated that lightning, such as that shown on our cover, is found around possible volcanic mountains on Venus. (See page 8.) Bryan Crader / Tom Stack & Associates