Face it: All your coolest friends are really good at vape tricks, and you can’t even manage a single ring. You’re sitting there blowing smoke out both ends wondering how the heck this stuff even ...

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 ...

Weather experts have been left baffled by a solid black ring which appeared in the sky -- but a former UFO investigator claims it's a Smoke Vortex. SWNS.com Alien hunters say a fresh sighting of a ...

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These ghostly hoops have been spotted above volcanic events around the world. But how they form has long been a mystery. Mount Etna—located in Catania, Italy—is one of the rare volcanoes that can blow ...

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Forbes contributors publish independent expert analyses and insights. Eric Mack is a reporter covering science, sustainability and space. For the second time in a month, strange black circles of smoke ...