Across
- 3. founded the religion Islam
- 5. shifting-farming civilizations
- 7. member of the propaganda movement who obtained Ph.D. in Pharmacy
- 8. he issued the first public typhoon warning
- 9. the first orbiting space probe
- 13. river valleys of Mesopotamia
- 14. systematic understanding and explanation of the laws of nature
- 15. the world's oldest mechanically printed book
Down
- 1. survey that found most private schools are substandard
- 2. the first man to journey in outerspace
- 4. science is common sense
- 6. the utilized and controlled fire
- 10. the first vaccine developed by Jonas Salk
- 11. he studied heavens using telescope
- 12. developed pasteurization