Across
- 1. used by early humans for tools and shelter
- 3. To alter the past
- 4. Nick's birthday month
- 5. A share of ownership in a corporation
- 7. largest planet in our solar system
- 8. age, when woolly mammoths roamed the earth
- 11. Name for the people who panned for gold
- 13. tool that helped separate gold from dirt
- 15. the length of a bridge between two piers
- 18. A large telescope in space
- 19. A paradox created by time travel
Down
- 1. Mel Brooks very funny Western spoof
- 2. Nick's birth state
- 6. River on the east border of Iowa
- 9. University of Iowa mascot
- 10. Only U.S. President from Iowa
- 12. small chunks of pure gold
- 14. Nick's birthday day
- 16. president during the California gold rush
- 17. Club used to put