Earliest Humans

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Across
  1. 3. not simple
  2. 4. official, formal
  3. 6. specific, exact
  4. 9. new ideas, inventions,
  5. 11. split, crack
  6. 13. on purpose
  7. 15. official, strict, proper
  8. 16. extra, leftovers
  9. 17. through, by
Down
  1. 1. cause, create
  2. 2. productive, rich
  3. 5. roughly, nearly
  4. 7. share, deliver, spread
  5. 8. no longer living
  6. 10. leaders and followers
  7. 12. ideas about reality
  8. 14. solve, complete
  9. 15. large animals