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Video: X marks the spot? NASA spots bizarre X-shaped structures in Earth's upper atmosphere - and scientists warn they could wreak havoc on radio and GPS signals

NASA's Global-scale Observations of the Limb and Disk (GOLD) mission has revealed unexpected C- and X-shaped formations in an electrified layer of gas high above our heads called the ionosphere.

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Video: NASA spots bizarre X-shaped structures in Earth's upper atmosphere

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