Across
- 3. powerful
- 4. lasting a long time
- 6. revive or bring back to live
- 9. small objects revolving around Sun
- 10. another choice
- 13. abstract artistic style
- 14. solid sound
- 15. to rise above
- 17. at the same time
- 18. to take turns
Down
- 1. "not known" in disguise
- 2. powerful explosion
- 5. graph of human population
- 7. free market economic system
- 8. aliveness
- 10. without time
- 11. necessary for life
- 12. study of human populations
- 14. expected type
- 16. excel