Book excerpt: A tour of the body, telling the natural (evolutionary) history of each part, and the cultural history that records our response to it. Starting with the head, it moves down, chapter-by-chapter to end with the feet. Chapter titles include Samson'sHair, What's an Eye Without an Eyebrow? A Brief History of Navel-Gazing and Why do Men Have Nipples? With memorable insights, amusing anecdotes and revelations on every page.