Across
- 4. traveler from Earth to other planets
- 6. time to come
- 8. fighting and warfare
- 9. creatures not from Earth
- 10. reading/controlling somebody's mind
Down
- 1. computers and scientific inventions
- 2. negative version of the world
- 3. transport to other planets
- 5. characters with genetic differences
- 7. moving between the past and future