Across
- 2. elder boy
- 3. area
- 6. any of numerous extinct terrestrial
- 9. stone
- 11. come after
- 13. struggle
- 15. of course
- 16. say
- 17. condition
- 18. clean
- 20. a lot of
- 21. people
Down
- 1. stop sleeping
- 4. a workplace for the conduct of scientific research
- 5. cautiously attentive
- 7. secure from risk
- 8. principle
- 10. a historical place
- 12. together
- 14. a circular segment of a curve
- 19. traffic light
- 20. a body embalmed and dried