Red Sprite Lightning over the Czech Republic

[BrianSoddingBoru4]

That didn’t fall under ‘atmospheric science’. It was a chemistry experiment.

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The experiment used water (H2O), methane (CH4), ammonia (NH3), and hydrogen (H2). The chemicals were all sealed inside a sterile 5-liter glass flask connected to a 500 ml flask half-full of water. The water in the smaller flask was heated to induce evaporation, and the water vapor was allowed to enter the larger flask. Continuous electrical sparks were fired between two electrodes, in the larger flask, to simulate lightning in the water vapor and gaseous mixture, and then the simulated atmosphere was cooled again so that the water condensed and trickled into a U-shaped trap at the bottom of the apparatus.

Wikipedia -- Miller–Urey experiment

Which describes a chemistry experiment. 

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