Jayvian puzzle

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Across
  1. 3. the aggregate of people living together
  2. 5. hunter that gathers
  3. 7. A person who has been descended
  4. 11. group of fossils and anteaters
  5. 13. over kill
  6. 14. every thing covered in ice
  7. 15. period Before written records
Down
  1. 1. specific time
  2. 2. device or Implement that is used to carry a specific function
  3. 4. means structures made of large stones
  4. 6. kill someone horribly
  5. 8. 12,000 years ago when the first farmer
  6. 9. land that make a bridge
  7. 10. The early phrase of the Stone Age
  8. 12. bird do this when the season changes