Across
- 3. a distinct period of time
- 5. era the time after the birth of Christ
- 9. studies rocks
- 10. modern humans
Down
- 1. the study of genes
- 2. digs up the past
- 4. marks dates and events
- 6. a person who studies and writes about history
- 7. the study of the human past
- 8. a thousand years