2. The Ordered Universe: Why do planets appear to wander slowly across the sky?

3. Energy: Why must animals eat to stay alive?

4. Heat and the Second Law of Thermodynamics: How do humans control their body temperature?

5. Electricity and Magnetism: What is lightning?

6. Waves and Electromagnetic Radiation: Why do we see in color?

7. Albert Einstein and the Theory of Relativity: Can a human ever travel faster than the speed of light, at "Warp Speed"?

8. The Atom: Why?

9. Quantum Mechanics: How can the electron behave like both a particle and a wave?

10. Atoms in Combination: The Chemical Bond: How does blood clot?

11. Properties of Materials: How have computers gotten so much faster?

12. The Nucleus of the Atom: How do scientists determine the age of the oldest human fossils?

13. The Ultimate Structure of Matter: How can antimatter be used to probe the human brain?

14. The Stars: How much longer can the Sun sustain life on Earth?

15. Cosmology: Will the universe ever end?

16. The Earth and Other Planets: Is Earth the only planet with life?

17. Plate Tectonics: Can we perdict destructive earthquakes?

18. Cycles of the Earth: Will we ever run out of fresh water?

19. Ecology, Ecosystems and the Environment: Are human activities affecting the global environment?

20. Strategies of Life: What is Life: What is life?

21. Molecules of Life: What constitutes a healthy diet?

22. The Living Cell: What is the smallest living thing?

23. Classical and Modern Genetics: Why do offspring resemble their parents?

24. The New Science of Life: Can we cure cancer?

25. Evolution: How did life arise?

Appendix A: Human Anatomy.

Appendix B: Units and Numbers.

Appendix C: The Geological Time Scale.

Appendix D: Selected Physical Constants and Astronomical Data.

Appendix E: Properties of the Planets.

Appendix F: The Chemical Elements.

Glossary.

Credits.

Index.