Crossword Puzzle ( Extra Challenge)

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Across
  1. 2. political system based upon one ruler
  2. 5. Our ancestors are_____ to us since they are from so long ago
  3. 6. an object made by a human
  4. 7. a person who studies human history and prehistory
Down
  1. 1. Dinosaurs
  2. 3. the year or place wine was produced
  3. 4. The Eiffel tower is a type of_____