Health & Fitness

Iceland's Eyjafjallajökull volcano erupts and erupts and erupts, disrupting air travel

After an uptick of seismic activity starting in December 2009, Eyjafjallajökull begins erupting March 20, spewing water vapor and ash throughout much of May. At its worst, in mid-April, tons of glass-rich volcanic ash enter the jet stream. Because the ash is known to damage airplane engines Jon Gustafsson / Associated Press