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- 1. Hormones, history, and the shoulders of giants
- 2. How hormones work
- 3. The mysteries of reproduction
- 4. Water, salt, and blood pressure
- 5. The hard stuff: calcium, cells, bones, and cancer
- 6. Appetite, fat, and obesity
- 7. The thyroid gland
- 8. Light and dark
- 9. Changing perspectives