Prehistoric Crossword Puzzle

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Across
  1. 2. Contains 36 animals, one being nicknamed the "unicorn"
  2. 4. Single stone set on its end
  3. 7. The largest Moai erected
  4. 9. New stone age
  5. 10. Art that was permanent
  6. 13. Where the Moai were discovered
  7. 16. Old stone age
  8. 17. Art you could move
  9. 18. Two or more large upright stones supporting a large, flat, horizontal slab.
Down
  1. 1. Statues of heads carved from volcanic rock
  2. 3. Carved in one piece
  3. 4. Discovered the Lascaux Cave
  4. 5. The dog who helped discover the Lascaux Cave
  5. 6. Cave containing one of the most outstanding exhibits of prehistoric art
  6. 8. Before history
  7. 11. prehistoric megalithic structure on Salisbury Plain in Wiltshire, England
  8. 12. Circular arrangement of stones
  9. 14. After death
  10. 15. Before Christ Era