Across
- 2. discovery
- 4. mysterious
- 5. earth
- 7. the distance
- 9. amazing
- 12. to investigate
- 13. triangle
- 14. the theory
- 16. I think that
- 17. town
- 18. spaceship
- 21. strange
- 22. the ruins
- 23. I doubt that
Down
- 1. we calculate
- 3. circle
- 5. you measure
- 6. sacred
- 8. Its possible that
- 10. to excavate
- 11. to shine
- 15. the planet
- 19. I believe that
- 20. she supposes that
