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