For most of us, first-hand knowledge of Greenland is probably limited to flying over it en route to North America. It's likely that you've heard more about it over the last few months than in the...
Mount Etna, the volcano that towers over eastern Sicily, has again captivated the world with a spectacular show, spewing smoke and high into the sky.
But the defining event of Monday's eruption was the more rare pyroclastic...
