Yellowstone National Park is sitting on top of a supervolcano and scientists say that it just took a ââ¬Ådeep breath.ââ¬Â It erupts every 640,000 years and itââ¬â¢s been 640,000 years since the last one. If this blows it would be 1,000 times bigger than Mount St. Helenââ¬â¢s eruption.
http://edition.cnn.com/video/#/video/bestoftv/2011/01/27/am.kaku.volcano.cnn?iref=allsearch
http://edition.cnn.com/video/#/video/bestoftv/2011/01/27/am.kaku.volcano.cnn?iref=allsearch