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Historically, aging and death have been considered inevitable and irreversible processes, but nowadays, the scientific community begins to consider them as just another disease that can be cured.
Obviously this is something extremely complex because there is no single factor that causes aging, moreover, our body is programmed to die when nature considers that we have already fulfilled our mission.
There are several lines of research on the subject, such as the destruction of telomeres, which, as you know, are a kind of stopper, something similar to the shoe lace sheath, which has chromosomes to prevent them from "fraying".
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Lately a new one has been released, derived from the study of epigenetics, which is the science that language the body uses to communicate with and control the environment.
It would be like switches that indicate genes when they have to be activated or not, orchestrating the entire molecular machinery to, for example, tell a cell that has to form a bone and not a mustache hair.
Roughly, let's say that this information deteriorates over time, causing cells to appear, let's say "out of place", contributing to damage to the body.
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If we were able to regenerate that information, things would work again, causing our bodies to age more slowly.
This is obviously very far from being everyday and I suppose that, unfortunately, it will not be for me, but it would not be unreasonable to think that our grandchildren could live hundreds of years.
If you still remain curious:
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