CATANIA, Italy -- Smoke rings were observed coming out of Sicily's Mount Etna on Sunday, after a vent opened on the southeastern crater last week. Footage by Rosario Catania shows Europe's largest ...

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 ...

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, ...

Residents of Hendersonville, NC, claimed to see a bizarre sight the night of Sunday, June 29.. They reported seeing rings of black smoke floating in the sky, sparking curiosity and confusion. People ...