Across
- 3. The Fermi blank asks why we haven't found aliens yet
- 5. The tough water bear that can survive extreme conditions
- 8. The red planet and strongest candidate for finding water evidence
- 10. Organisms that love and thrive in extreme environments
- 11. The type of tiny single-celled life scientists think is most common
- 12. Juipter icy moon with a liquid ocean underneath
Down
- 1. The crucial liquid ingredient needed for all known life
- 2. The zone around a star where life can survive
- 4. Planets located outside our own Solar System
- 6. The study of life in the universe
- 7. The layer of gases around a planet that can trap heat
- 9. Finding planets by measuring drops in starlight