Mount Etna put on a spectacular show for astonished tourists as they watched the volcano blow smoke rings into the sky. The rare phenomenon - known as volcanic smoke rings - can only form in a ...

The Ring of Fire is home to 75% of the world's volcanoes and 90% of its earthquakes. 2 min read The Ring of Fire is a roughly 25,000-mile chain of volcanoes and seismically active sites that ...