A group of hikers look at one of the smoke rings Europe's most active volcano, Mount Etna, is blowing scores of ethereal "vortex rings" every day from a single vent located in one of its most active ...

Air rings blown by dolphins swimming underwater and rings of smoke emitted by jet engines are just two examples of vortex rings. These doughnut-shaped structures and their mesmerizing movement have ...

STORY: Volcanic vortex rings are natural, near-perfect circles of gas emitted from a volcano under specific conditions and scientists say Mount Etna emits more than any other volcano on earth. It is a ...

The study of vortex ring dynamics centres on understanding the formation, evolution and decay of toroidal vortices generated by pulsed fluid jets. These phenomena are crucial in a wide range of ...

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, ...

VOLCANO VORTEX RINGS: Rare volcanic vortex rings were spotted rising above Mount Etna in Italy recently. The natural phenomenon occurs when gases emitted from the volcano ascend rapidly through the ...

Researchers have achieved a groundbreaking milestone in studying how vortices move in these quantum fluids. A new study of vortex ring motion in superfluid helium provides crucial evidence supporting ...

The aft tail boom of the Bell 429 was discovered 390 feet from the main wreckage. Credit: NTSB Flight training should not result in unrecoverable flight conditions or catastrophic structural failures, ...

Air rings blown by dolphins swimming underwater and rings of smoke emitted by jet engines are just two examples of vortex rings. These doughnut-shaped structures and their mesmerizing movement have ...