NASA spots unexpected X-shaped structures in Earth's upper atmosphere — and scientists are struggling to explain them - Livescience.com

* NASA spots unexpected X-shaped structures in Earth's upper atmosphere — and scientists are struggling to explain them  Livescience.com
* Alphabet Soup: NASA's GOLD Finds Surprising C, X Shapes in Atmosphere  Science@NASA
* NASA Discovers Strange Spectral Formations High Over the Earth  Futurism
* Strange X and C shapes discovered in Earth's ionosphere  indy100
* NASA scientists observe bizarre alphabet-shaped structures glowing above Earth's atmosphere  GOOD


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