General knowledge

123456789101112131415161718192021
Across
  1. 4. One who pillages (6)
  2. 7. Ale-lemonade drink (6)
  3. 8. Engine trial-run support (7)
  4. 9. In technology for lasers, abbrev. for "Infrared" (2)
  5. 11. In 1950 this movie received the Oscar in Best Art Direction category _____ BLVD.) (6)
  6. 12. Native of Baranof Island, Alaska (6)
  7. 14. Synonym for "conversation" (4)
  8. 16. Waterway that flows through Burkina Faso (______ RIVER) (6)
  9. 17. Like King Arthur (9)
  10. 20. Which Mexican company sued Apple over a brand name? (5)
  11. 21. 1953 Sophia Loren film based on a Verdi classic (4)
Down
  1. 1. Synonym for "end" (5)
  2. 2. Received the Nobel Physics Prize in 1980 (VAL _____ FITCH) (7)
  3. 3. Burrowing beach denizens (9)
  4. 5. Adjectival suffix on mythological names (3)
  5. 6. Who said "Too much of a good thing is wonderful"? (____ West) (3)
  6. 10. Entering on a computer (6)
  7. 12. Archaeologists often find what they're looking for in this (4)
  8. 13. A language of India (6)
  9. 15. Is known as the "Father of Geometry" (6)
  10. 18. The Internet extension for Egypt (2)
  11. 19. Public square in ancient Greek cities, used for assemblies, markets, and socializing (5)