Our mysterious world crossword puzzle

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Across
  1. 3. The spirit of a dead person is a
  2. 6. Something unusual and unexpected
  3. 10. The Loch Ness monster's name
  4. 11. a person who is afraid is
  5. 13. A scary vampire who has a castle
  6. 16. Something that can harm you is
  7. 17. a synonym for terrible
Down
  1. 1. an unknown flying object is sometimes known as
  2. 2. Giant stones in England over 4000 years old
  3. 4. If you think of something again you
  4. 5. The large furry gorilla monster
  5. 7. Area 51 is in which state in the USA?
  6. 8. Something difficult and impossible to understand
  7. 9. Something that can't be explained
  8. 12. These flying machines often got lost in the Bermuda triangle
  9. 14. Mysterious circles made on farms, also known as ___ circles
  10. 15. a person from outer space is