This updated edition of Philip Reilly's highly praised and provocative book has been expanded to include an essay about the fast-moving and controversial field of personal genomics. In the essay, Reilly explains how new, cutting-edge technologies have facilitated the rapid discovery of genetic markers associated with ailments such as macular degeneration, heart disease, and schizophrenia. He describes how the same powerful technologies can be used to interpret the DNA sequence of anyone in the world—who can afford it. But how valuable are the data obtained from these tests? Will "personalized medicine" really improve our health and well-being? And at what cost? Reilly's new essay is a worthy addition to his entertaining and informative collection of stories on topics such as genetics and the future of sports, the evolutionary origins of humans, the mysteries of genetic diseases, the similarities between dogs and people, the impact of genetic engineering on what we eat, and the ethical dimensions of stem cell research.