• hector@lemmy.today
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    2 days ago

    It is not possible for a human to live 200 years. 150 would be more than about the absolute maximum. Your body has stem cells and they put forth cells for the body pre-programmed for cell death after a term where they’re replaced by new stem cells.

    There are only so many copies in those stem cells to say nothing of the degradation of the DNA over time. For human history the maximum age has never changed, the average age has wildly fluctuated but they have had super old people going back into antiquity.

    No advances in medicine have changed either the degradation of DNA or the lack of stem cell copies in the body to live beyond the maximum age.

    • HugeNerd@lemmy.ca
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      2 days ago

      It’s not an inherent property of matter. The fact that two 30 years old can make a zero year old baby means it’s strictly a software issue.

    • Slotos@feddit.nl
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      2 days ago

      The maximum age hasn’t changed because its increase is irrelevant for the sake of trait propagation. In fact, fast breeding population with regular turnaround can deal with environmental fluctuations way better than a long living one.

      There’s nothing inherent to multicellular biology that prevents immortality. Every problem preventing us from living longer and healthier has been solved by evolution somewhere else. Often in a way that’s insultingly similar to how our bodies already work. Hell, good chunk of solutions is present in our genome never to be expressed!

      But then evolution is all about populations of borderline inadequate survivors. Turns out, being depressed, hurting, and cancerous in your fifties is just good enough.

      • TotallynotJessica@lemmy.blahaj.zoneM
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        2 days ago

        Exactly. We’re programmed to die of old age, not because it’s impossible for things to be otherwise, but because it was so darn advantageous. It speeds up iteration, allowing the genes to evolve at a faster rate. Evolving immortally would be an expense without much benefit, so it generally wouldn’t happen naturally.

      • hector@lemmy.today
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        2 days ago

        Yes we could evolve to live longer, but as you point out we are not, and science is no where near rewriting the code to fix that in designer babies let alone already old rich pricks.

        Naturally it would take a long time and it is hard to see how we would evolve there, but parrots, some turtles, tortoises, sharks, sturgeon, and idk what else have done it.

        Greenland sharks live over 500 years I think I saw on a post on the big site.