Prehistory

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Across
  1. 4. favorite pterosaur
  2. 7. first geological period
  3. 9. warm blooded creatures
  4. 10. first walking with series
Down
  1. 1. favorite marine reptile
  2. 2. most recent geological period
  3. 3. second walking with series
  4. 5. geological eon
  5. 6. third walking with series
  6. 8. large supercontinent