Across
- 4. First with trigonometric table
- 8. "Father of Medicine"
- 9. student of Socrates and teacher of Aristotle
- 11. Created a doctrine saying air is the source of all things
- 12. Founder of Ionian natural philosophy
- 14. Founder of Western Philosophy
- 15. Greatest astronomer of antiquity
- 17. "Father of Modern Science"
- 18. "Father of Geometry"
Down
- 1. Theorized cosmic cycle of love and strife
- 2. Claimed all things were numbers
- 3. Greatest engineer of the ancient world
- 5. Established that Earth was the center of the Universe
- 6. Made a map of the inhabited world
- 7. Calculated circumference of Earth
- 10. Discovered earth is a sphere
- 13. First to propose a sun-centered universe
- 16. Founder of Atomism