This one is quite neat. Here's a YouTube clip show...  ...te neat. Here's a YouTube clip showing all of the air traffic in the world in a single day, condensed to a litt...  ...sed to a little over a minute:The yellow dots are airplanes in the sky during a 24 hour period. Stay with the...  ...he Earth spins on i...

(YouTube link) This video shows how air traffic slowed to a halt over Europe as the volcanic ash...  ...go. (vimeo link) And this video shows how traffic