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Across
  1. 1. nothingness
  2. 4. symbol of addition
  3. 6. literally afterburn
  4. 7. somehow related to recursion and exclamation
  5. 9. Titanic the ship can't do, but Titanic the wifi can.
  6. 10. nonexistence
  7. 12. keep you down-to-earth
Down
  1. 2. in the middle of the LDL, but pronounced as 'R'
  2. 3. something parellel in most science fictions
  3. 5. vectorial speed
  4. 8. part of the first place in BOFU2016
  5. 11. between TNT
  6. 13. behind blaze and end