Sci-Fi Words

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Across
  1. 3. an imaginary creature that lives on or comes from Mars
  2. 6. originating, existing, or occurring outside the earth or its atmosphere
  3. 10. a theoretical reality that includes a possibly infinite number of parallel universes
  4. 12. travelling by a very fast form of imaginary transport using special technology
Down
  1. 1. self-replicating computer programs
  2. 2. the highest possible speed
  3. 4. a robot that looks like a person
  4. 5. a weapon that fires some unspecified form of radiant energy
  5. 7. a hypothetical device that permits travel into the past and future
  6. 8. a bionic human
  7. 9. sci-fi about future urban societies dominated by computer technology
  8. 11. Unidentified Flying Object