less. 13 word puzzle

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Across
  1. 2. ___ doctors weer especially skilled at surgery
  2. 3. a study of numbers
  3. 4. a situation of wealth and success
  4. 6. a study of stars and planets
  5. 8. a time of happiness and prosperity
  6. 10. fell around 187 BCE
  7. 11. They wrote poetry,___ ,and folkstales
  8. 12. a cave that has paintings
Down
  1. 1. a theory one lives by
  2. 5. a split of a country or empire
  3. 7. a positive result gained by hard work
  4. 9. the whole lesson is about this empire