Across
- 2. the ____ of suspicion theory
- 4. the primary need of civilizations
- 5. The solution by which civilizations reach an impassable point (we may have already passed this)
- 6. Search for _________ Intelligence (SETI)
- 7. the great _____
- 9. dark ____
Down
- 1. are we ____?
- 3. the attribute we are looking for in alien life
- 8. there has been no ___