Massive supervolcano eruptions once rocked Yellowstone - CSMonitor.com

http://www.csmonitor.com/Science/2016/0326/Massive-supervolcano-eruptions-once-rocked-Yellowstone?cmpid=ema:nws:Science%2520Weekly%2520%2803/31/2016%29&utm_source=Sailthru&utm_medium=email&utm_campaign=20160331_Newsletter:%20Science&utm_term=Science_final