Mostly unrelated, a lava lake video for screensaver inspiration:
From occasionally spectacular volcano feed, your tax dollars at work: http://hvo.wr.usgs.gov/multimedia/
That is quite nice.
Why is it going off to the right? It is beautiful.
I saw the picture before the headline, so my first thoughts were "Cool! A slate globe, I wonder who's teaching spherical trig? Hmmm, it's awfully clean-looking, I've only seen pictures of old ones covered in chalk dust and partially erased diagrams."
the world is my black pearl oyster.