Aliens

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Across
  1. 3. important(4)
  2. 4. hundred years(1)
  3. 5. state of existing(1)
  4. 6. producing or reflecting bright light(2)
  5. 7. a plate like thing(4)
  6. 8. to say the secret(4)
Down
  1. 1. numerous(1)
  2. 2. not existing(3)
  3. 4. proving that something is true(4)