Across
- 4. a physicist
- 7. astronomy
- 9. a scientist
- 13. genetics
- 14. UFO
- 15. to invent
- 16. inventor
- 17. to prove
- 21. a doctor
- 22. a mathematician
- 24. astrophysics
- 25. comet
- 27. earth
- 30. progress
- 31. technology
- 32. an experiment
Down
- 1. rocket
- 2. biology
- 3. researcher
- 5. invention
- 6. the planet
- 8. a discovery
- 10. science
- 11. to discover
- 12. chip
- 18. to explore
- 19. mathematics
- 20. physics
- 23. to create
- 26. space
- 28. research
- 29. to demonstrate
