Pistol shrimps have one larger, modified claw. When they open it and snap it shut, it produces a fast-moving vortex ring. The vortex ring produces a cavitation bubble, which collapses, producing heat, ...

Smoke rings are being seen in a new light. Doughnut-shaped structures called vortex rings are sometimes seen swirling through fluids. Smokers can form them with their mouths, volcanoes can spit them ...

You probably have seen smoke rings blown by cigarette smokers or bubble rings from playful dolphins. But do you know that they are closely related to each other and officially known as the vortex ring ...

Bubble ring created by a humpback whale named Thorn. Credit: © Dan Knaub, The Whale Video Company. June 5, 2025, Mountain View, CA -- A team of scientists from the ...

In short: Volcanic vortex rings have formed above Mount Etna in Italy. Volcanologist Ana Casas Ramos says the rings are made of condensed water which forms when hot vapour from the volcano hits cold ...