Armageddon Schmarmageddon

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Across
  1. 2. deadly space radiation
  2. 4. who let the nanites out?
  3. 5. manmade gases trapping heat
  4. 6. space rock
  5. 7. a.k.a. a walker
  6. 8. grab a surfboard!
  7. 11. better have some spf 15,000 handy!
Down
  1. 1. our very own super volcano
  2. 2. south korean dance craze that will destroy civilization
  3. 3. nuclear chill
  4. 5. invaders from beyond
  5. 9. i'll be back!
  6. 10. think cute sabre tooth squirells
  7. 12. big bad particle racetrack in Geneva