blowing
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Eerily perfect ‘vortex rings’ keep blowing out of Europe’s most active volcano. Here’s why.
A “vortex ring” that was puffed out by Mount Etna on July 23. (Image credit: Luca Cosma) Europe’s most active…
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A “vortex ring” that was puffed out by Mount Etna on July 23. (Image credit: Luca Cosma) Europe’s most active…
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