Three-ring circus. The sky over Italy’s Mount Etna fills with ‘smoke rings’ as a newly formed crater puffs out perfect circles of vapour. The circles — called volcanic vortex rings — form when cold ...
June 5, 2025, Mountain View, CA -- A team of scientists from the SETI Institute and the University of California at Davis documented, for the first time, humpback whales producing large bubble rings, ...
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