HAL HELLMAN is the author of twenty--seven popular science books, including Great Feuds in Science (Wiley) and the six--book series World of the Future. He has also written science articles for the New York Times, Omni, Reader's Digest, Psychology Today, and Geo.

Acknowledgments. Introduction. Harvey versus Primrose, Riolan, and the Anatomists: Circulation of the Blood. Galvani versus Volta: Animal Electricity. Semmelweis versus the Viennese Medical Establishment: Childbed Fever. Bernard versus Chemists, Physicians, and Antivivisectionists: Experimental Medicine. Pasteur versus Liebig, Pouchet, and Koch: Fermentation, Spontaneous Generation, and Germ Theory. Golgi versus Ramon y Cajal: The Nerve Network. Freud versus Moll, Breuer, Jung, and Many Others: Psychoanalysis. Sabin versus Salk: The Polio Vaccine. Franklin versus Wilkins: The Structure of DNA. Gallo versus Montagnier: The AIDS War. Epilogue. Notes. Bibliography. Index.