Oh great. Here's some more disaster stuff to worry about. Personally, my natural disaster of choice for sleepless nights is the supervolcano. Yes, the supervolcano -- the last known explosion nearly wiped out mankind! More specifically, we ought to worry about the supervolcano underneath Yellowstone National Park, which is long overdue for an eruption. I saw a Discovery Channel documentary on this little bugger recently, and scientists now know for sure that the supervolcano chamber is filling up. Dum dum dum. Ominous! Asteroids and New York-destroying tidal waves, after all, are a matter of "if", not "when." The supervolcano, though, is a matter of "when".