A New Generation of Superold People, Created Without Genetic Tinkering

Living to be 100 years old is going to become more common in the twenty-first century, even if we don't make any great leaps forward in medical technology. The Archives of Internal Medicine today published a study showing that genetics account for only about one-fourth of the variation in human life span. That means… »2/11/08 4:10pm2/11/08 4:10pm