ancient civilizations

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Across
  1. 1. the best of the messengers.
  2. 4. snakes instead of plaits.
  3. 6. one eye between them.
  4. 7. the home of the pyramids.
Down
  1. 1. queen of it all.
  2. 2. started physics.
  3. 3. ruler of the gods.
  4. 5. 3 in one,joined at the neck.