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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 1:10pm 2/11/08 1:10pm