Across
- 2. - Greek mathematician known for theorem (10)
- 6. LISA - Famous painting by Leonardo da Vinci (8)
- 7. - Head of state in a republic (9)
- 10. - Renaissance artist known for "The School of Athens" (7)
- 13. - Famous theater district in New York City (8)
- 15. - Study of nutrients and how the body uses them (9)
- 17. - Renowned theoretical physicist (7)
- 18. - Playwright of "Hamlet" and "Othello" (11)
- 19. - Greek philosopher, student of Socrates (5)
- 20. - Community of interacting organisms and their environment (9)
- 23. - Step-by-step procedure for solving a problem (9)
- 24. - Mountain range containing Everest (9)
- 26. - Author of "The Prince" (11)
- 28. - Branch of physics dealing with particles at atomic scales (7)
- 29. - Iconic museum in New York City (10)
- 30. - Study of celestial objects and the universe (9)
Down
- 1. - Extremely luminous active galactic nucleus (6)
- 3. - Prestigious university in England (6)
- 4. - Capital of Austria (6)
- 5. - Line where the earth's surface and the sky appear to meet (7)
- 8. - Philosophy focused on pleasure as the highest good (10)
- 9. - Napoleon's final battle (8)
- 11. - Organ responsible for thought and memory (5)
- 12. - Elaborate musical composition for orchestra (8)
- 14. - Study of fundamental nature of knowledge (10)
- 16. - Large instrumental ensemble (9)
- 21. - Famous ship that sank in 1912 (7)
- 22. - Long-distance running race (8)
- 25. - Shape with many sides (7)
- 27. - Renowned Renaissance artist (8)