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12 December 2013
Amid flashing lightning and booming thunder, storms emit a very powerful but little understood form of energy — gamma radiation. These terrestrial gamma-ray flashes (TGFs) produce short-lived but immensely powerful bursts of energy that could zap airplane passengers with unhealthy doses of radiation. Now, researchers at the University of California, Santa Cruz think they might be able to use a smartphone app to learn more about these mysterious bursts.