Watch this airplane photobomb the Sun

Amateur solar astronomer Andrew Devey has been making daily records of solar activity since 2005. His website, The Solar Explorer, could well be the most extensive roundup of jaw-dropping solar GIFS on Earth. Featured here is one of our favorites from his browser-crashing collection. "I was filming a large active… » 2/18/13 1:45pm 2/18/13 1:45pm

Volcanoes caused a "little ice age" in Europe 500 years ago, say…

From 1550 to 1850, Earth mysteriously got colder. Communities from Greenland to the Alps were swallowed up by glaciers, and bodies of water like the Baltic Sea and Manhattan Harbor froze over. But what caused this Little Ice Age? » 1/30/12 12:58pm 1/30/12 12:58pm