From www.youtube.com - November 18, 2012 4:27 PM

A supercomputer at NASA's Goddard Space Flight Center was used to map aerosols - particles suspended in the air - based on observations from August 2006 - April 2007. The result is surprisingly lovely. I've marked a couple of pints you want to pay attention to, like a volcanic eruption near Madagascar; the effect of the event is stunning.