Across
- 1. deadliest diseases in history
- 6. gas giant
- 9. asian beachless country
- 11. easiest programming language
- 12. animal with smallest brain
- 14. first child in the world
- 15. the lightest solid
- 16. knock knock!
- 17. unseen
- 20. invisible but very useful
- 21. brightest thing ever known
Down
- 2. the most dangerous chemicals
- 3. smallest thing
- 4. the fastest thing
- 5. chosen man
- 7. father of algorithms
- 8. spiderman villain
- 10. biggest satelite
- 13. flying space rock
- 18. elon musk company
- 19. red liquid