Ancient Greeks

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