Across
- 3. caused by someone
- 7. fine distinctions
- 9. no one knows the answer
- 11. researchers who study human and animal behavior
Down
- 1. an unusual event
- 2. a doctor who deals with mental illness
- 4. a person trained to do research
- 5. quickly learn
- 6. gradually develop
- 8. a large strong breed found in newfoundland
- 10. hard to figure out