Mount Etna volcano puffs giant rings of gas, photos and videos show - The Washington Post The Washington Post
Watch: Mount Etna puffs 'smoke rings' in rare display BBC.com
Watch: Volcano Makes Captivating Vortex Rings Over Sicily - Videos from The Weather Channel The Weather Channel

Antarctica is covered in volcanoes, could they erupt? Livescience.com
Lava flow from volcano on an uninhabited Galapagos island reaches ocean Yahoo! Voices