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LearnThunderThunder is the sound produced by the rapid heating of air by a lightning strike.Read more
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LearnNacreous cloudsThese form in the lower stratosphere over polar regions when the Sun is just below the horizon. The clouds are illuminated from below and often glow in vivid colours.Read more
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LearnHow we measure visibilityVisibility sensors measure how far light travels before its brightness reduces by 95%, providing vital data to improve visibility forecasts in various sectors.Read more