Longevity is sometimes used as a synonym for "life expectancy" in demography. However, the term longevity is sometimes meant to refer only to especially long-lived members of a population, whereas life expectancy is always defined statistically as the average number of years remaining at a given age. Reflections on longevity have usually gone beyond acknowledging the brevity of human life and have included thinking about methods to extend life. Want your view.

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