Beginning of Essay
Why should the human body give out after 70, 80, or even 120 years? Why are older people more susceptible to disease, more inclined to have impaired vision and hearing, and likely to lose some of the physical and mental capacity they once enjoyed? There are no ful ....

Middle of Essay
.... diseases, accidents, and violence account for the rest--but not age. These same diseases and Alzheimer's disease account for much of the disability attributed to aging. As these diseases are conquered, far more people will live to their full potential life span and remain active and healthy for life. A lot is known about the diseases that affect people and cause death. Much less is known about real aging because it involves fundamental cell processes that are quite complex. However, this mystery of life is being unraveled and will offer opportunities in the future that were once considered to be only possible in science fiction. It is hard to ....