Why Mount St. Helens Has Been Erupting Continuously for Four Years

Mount St Helens, a volcano long believed to be dormant in Washington State in the U.S., freaked people out back in 1980 when it suddenly erupted and spewed tons of lava and boiling mud into the air (as you can see in this picture). It calmed down for a few years, but in 2004 it started slowly erupting, and has been… » 2/20/08 7:00am 2/20/08 7:00am