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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Volcanic vortex rings emerge from a new pit crater on the north side of the southeast crater of Mount Etna in Sicily Mount Etna, ...

The science pros at TKOR build a giant smoke ring toy to study air vortex motion. Prince Harry visibly emotional as he says ...

Mount Etna in Sicily has been blowing spectacular ‘smoke rings’ into the sky since Wednesday. The volcano, which towers over the historic port city of Catania, is the largest in Europe and one of the ...

Tourists in Italy have been treated to quite the show as Mount Etna, the largest active volcano in Europe, has been blowing spectacular “smoke rings” into the sky since last week. The rare phenomenon, ...

In high school, I once tried to build a smoke-ring-generating vortex cannon out of a five-gallon paint bucket, a t-shirt, and some dry ice. My contraption was a letdown. It produced weak, wispy rings, ...

To see the gun in action, go to http://tinyurl.com/8xu2npq Engineers at the Battelle Memorial Institute are patenting a special vortex gun they developed. It might ...

Better understanding the formation of swirling, ring-shaped disturbances -- known as vortex rings -- could help nuclear fusion researchers compress fuel more efficiently, bringing it closer to ...