We all know that, with the deciphering of the human genome as well as those of other animals, and of plants, that the future will bring a new level of understanding and control of our own heredity. But what can the present level of genetic testing provide? In this story, writer David Duncan has as much determined about his future as you can learn with current technology. He gets some surprises from his mitochondrial DNA, and learns that the most likely thing to kill him will be heart failure. How many us want to know whether we are likely to get diabetes, arthritis, heart disease, lung cancer, or Alzheimer's disease - or whether we even want such information to exist anywhere?