Wilbert Benjamin 9C / 9-9-2021

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Across
  1. 3. Father of observational astronomy
  2. 10. Founder of Pythagoreanism
  3. 13. Founder of graph theory and topology
  4. 14. Inventor of dynamite
  5. 16. Investigator of spiral
  6. 17. Founder of lightning rod
  7. 18. Inventor of analytic geometry
  8. 19. Maroon 5's singer
  9. 20. World's greatest dramatist
Down
  1. 1. 35th US President
  2. 2. Invetor of calculus
  3. 4. Founder of Amazon
  4. 5. Theorist of evolution
  5. 6. Father of modern medicine
  6. 7. Founder of Lyceum
  7. 8. 46th US President
  8. 9. Founder of Western philosophy
  9. 11. Founder of Platonist School
  10. 12. Mr. Bean's actor
  11. 15. 44th US President