1. How complex is the human brain?
2. What does the author say lies underneath one's exterior looks?
3. What does the author call self-healing material?
4. About how many pounds does a brain weigh?
5. How does the author refer to the brain?
6. What is one of the types of cells in the brain?
7. What is another type of brain cell?
8. In what number range does the author say the brain cells count?
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