Chapter 1. Are Equids Evolutionary Dead Ends? -- Chapter 2. Evolutionary Radiation of Equids -- Chapter 3. The Miocene Browsing Horses: Another Way to Be a Successful Large Equid -- Chapter 4. Why There Are No Modern Equids Living in Tropical Lowland Rainforests -- Chapter 5. Evolution of Equid Body Size -- Chapter 6. Forage Consumption and Digestion in the Modern Equids -- Chapter 7. Revisiting the Jarman-Bell Principle -- Chapter 8. Equid Adaptations to Cold Environments -- Chapter 9. Adaptations to Hot Environments -- Chapter 10. Diseases and the Distributions of Wild and Domestic Equids -- Chapter 11. How Equids Cope with Macroparasites -- Chapter 12. Equids and Predators -- Chapter 13. Evolution of the Equid Limb -- Chapter 14. On Humanity and Equids: Ecologies, Trajectories, and Relationships -- Chapter 15. Conclusion - A New Story of the Modern Equids.