Nothing catches an eye in a cigar lounge like the perfect cigar ring. That slow-floating circle, drifting lazily through the air, screams one thing to the world: you’re a master cigar serenader. There ...

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 ...