Across
- 2. Key to life as we know it
- 3. Kind of water that would make survival tough
- 6. Life form found at hot-water vents on Earth
- 7. Where silica usually forms on Earth
- 9. Years Opportunity has been on Mars
- 10. Mineral that usually forms in water
Down
- 1. Once exploded at Home Plate
- 4. Location where Spirit found chemical-rich rocks
- 5. Synonym for "significant"
- 8. Mineral accidentally found at Home Plate