Across
- 2. Planet that will be conquered by 2024, according to SpaceX
- 3. Final stage of extinction
- 8. Largest planet
- 12. Most recent extinction event, extinction of the dinosaurs
- 13. Planet with rings
Down
- 1. Cells without Nuclei, first cells
- 4. Closest planet to the sun
- 5. Theory of the beginning of the universe
- 6. Biologist who created the theory of evolution with help from Galapagos Birds
- 7. Hottest planet
- 9. Planet on its side
- 10. farthest planet from the sun
- 11. Cells with nuclei