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 ...

If there’s one vape trick that always impresses, it’s the smoke (well, vapor) ring. Not only is it one of the more impressive tricks, but it’s easy to learn and master with little guidance! Struggle ...

Some scientists think we can better understand volcanoes by learning how the gaseous vortexes emerge. By Carolyn Wilke Some volcanoes perform a rather subtle trick: blowing rings of vapor that waft ...