noctilucent clouds

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www.vox.com

Why eerie, glowing noctilucent clouds are showing up more often

A certain form of mysterious shimmering, soaring cloud is starting to appear more often in the night sky, and scientists are working to understand why.

Noctilucent clouds seen in skies over Portland and London
www.washingtonpost.com

Noctilucent clouds seen in skies over Portland and London

The beauty of noctilucent clouds belies a hidden climate warning.
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