Crossword Challenge

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Across
  1. 6. National anthem of France
  2. 7. Classical famous Greek philosopher
  3. 10. How many stars does the flag of China have?
  4. 11. Strongest muscle of the human body
  5. 13. How many hearts does an octopus have?
  6. 14. Ancient country where the olympic games originated
  7. 15. Author who wrote Don Quijote
  8. 18. Most streamed show on Netflix 2020.
Down
  1. 1. Colour that represents hope. It can be seen on many flags
  2. 2. where insulin is generated?
  3. 3. Artist who painted "The last supper
  4. 4. The biggest animal in the world
  5. 5. Country where one of the best emperors and conquerors in history was born
  6. 8. Capital of Iceland
  7. 9. What does "He" stand for in the periodic table
  8. 11. The best-selling album in history, by Michael Jackson
  9. 12. Country in Europe shaped like a boot
  10. 16. The first metal that man used, one of the most used today
  11. 17. Author who wrote the odyssey