Across
- 6. Answer to problem
- 10. A quicker route
- 11. Albert ...
- 12. Space hole
- 14. Regulation
- 15. Time
- 16. Period
- 18. Something contradictory
- 20. Effect
- 21. Physics: force
Down
- 1. Specific recollection
- 2. Emotional effect
- 3. A mechanical device
- 4. Predecessor
- 5. Cumulative effect: ... effect
- 6. Science expert
- 7. Transportation to past or future: time ...
- 8. Unable to move
- 9. All of space
- 13. Past events
- 14. Theory of space and time
- 17. Change, alter
- 19. 100-year period