Early Migration

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Across
  1. 1. Before the birth of Christ
  2. 3. To have a strong and often bad effect on
  3. 4. Abbreviation for “Anno Domini,”
  4. 5. Tools used or made by persons in the past
  5. 6. To make better
  6. 9. Bring to a more advanced or effective state
  7. 10. A person who studies human history through the excavation of sites
  8. 11. The natural environment encompasses all living and non-living things
Down
  1. 2. An advanced state of human society
  2. 4. A variety of wild plants used for food
  3. 7. An ice bridge connecting Siberia and Alaska
  4. 8. A hundred years