Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.

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Across: 5. What is the scientific name for an alien? 6. A being from outer space. 7. What tribe was supposedly helped by aliens, and made patters in the desert sand? 8. What strange ships have gotten thousands of reports of being seen? 9. What material are aliens made out of?

Down: 1. What are the signals that are supposedly from aliens called? 2. What is it called when people disect aliens? 3. What are lights are the lights called that hover over crop circles? 4. What are pattern formations that appear in crops? 5. What is the study of an aliens life called? 6. What do you call it when somebody gets taken away by aliens at night?