TodayÕs scientists are showing us how stem cells create and repair the human body. Unlocking these secrets has become the new Holy Grail of biomedical research. But behind that search lies a sharp divide. Stem cells offer the hope of creating or repairing tissues lost to age, disease, and injury. Yet because of this ability, stem cells hold the potential to incite an international biological arms race. THE STEM CELL DILEMMA will tell you everything you ever wanted to know about stem cells: what they are, how they work, and why their use has become so controversial. We are standing at a scientific crossroads, the likes of which the world has never seen. It is a moment that will change forever the practice of medicine and the future of life as we know it.