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. Video Credit: NASA/GSFC (http://gmao.gsfc.nasa.gov/research/aerosol/) Music Credit: Kevin MacLeod, "Satiate", Incompetech.com Annotated by me. Blog post (goes live Nov 17 at 08:30 Eastern time): http://www.slate.com/ blogs/bad_astronomy/2012/11/16/nasa_makes_an_animated_global_map_of_atmospheric_aerosols.html