Mount Etna Puffs Out Smoke Rings Measuring Hundreds of Feet

Since erupting on November 11, the Mount Etna volcano has been blowing perfect smoke rings into Sicily's skies.

Along with the rare giant rings of steam, the volcano has coughed out hot clouds and fountains of lava.

German volcanologist Tom Pfeiffer was there the afternoon of the storm and could observe and photograph the phenomenon: "Being Etna, she exaggerates: not only one ring every now and then, but she made dozens if not hundreds during a few hours, often in a row," he said.

Mount Etna is one of the world's most active volcanoes, erupting from a rocky cone that rises more than 10,000 feet (3,329 meters) above the southeast coast of Sicily.