Even without a mythical fountain of youth, scientific advances have already dramatically increased how long humans live. But those advances to date have largely been due to lower mortality rates, less infectious disease, and better nutrition. So when will modern medicine increase not just our healthspan
, but our lifespan
-- slowing down and possibly even reversing aging? What tools will it take? And what else, beyond the biology and technology involved, would change in our healthcare system and society as a whole, as a result of such longevity?
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