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  1. en.wikipedia.org › wiki › Ice_crystalIce crystal - Wikipedia

    Ice crystal. A close-up of growing ice crystals displaying typical hexagonal symmetry. Ice crystals are solid ice in symmetrical shapes including hexagonal columns, hexagonal plates, and dendritic crystals. [1] Ice crystals are responsible for various atmospheric optic displays and cloud formations. [1] [2]

  2. en.wikipedia.org › wiki › LightningLightning - Wikipedia

    Lightning is a natural phenomenon formed by electrostatic discharges through the atmosphere between two electrically charged regions, either both in the atmosphere or one in the atmosphere and one on the ground, temporarily neutralizing these in a near-instantaneous release of an average of between 200 megajoules and 7 gigajoules of energy ...

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