Scientists Figure Out How to Create 'Smoke Rings' of Light - Galaxy Reporters

Doughnut-shaped structures called vortex rings are occasionally seen swirling through fluids. Smokers can create them with their mouths; volcanoes can spew them out during explosions, and dolphins can blow them as bubble rings. Now, scientists can establish t…

Doughnut-shaped structures called vortex rings are occasionally seen swirling through fluids. Smokers can create them with their mouths; volcanoes can spew them out during explosions, and dolphins ca… [+1321 chars]

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