aLife extension : an overview / Ker Than -- Aging is a disease that science should cure / Joel Garreau -- Life extension raises complex social issues / George Dvorsky -- Early intervention extends life and ensures health / S. Jay Olshansky ... [et al.] -- Longer lifespans could make people feel dissatisfied and less human / Ker Than -- Opposition to life extension is based on myths / Joô Pedro de Magalhês -- Extending the human lifespan is a moral imperative / George Dvorsky -- Life-extension technologies can be misused / Leon R. Kass -- Science should extend the human lifespan indefinitely / Aubrey de Grey -- Science would be wrong to extend life indefinitely / Diana Schaub -- Life extension widens the gap between rich and poor / Melissa Fusco.