Why do our bodies get older, and why do we all eventually die of old age?
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The cells have DNA and telomeres which shorten each time a new copy is produced eventually they can do this any more without damaging the DNA along with this the general wear and tear on the body becomes cumulative and basically everything grinds to a halt a bit like an old car. https://youtu.be/x-NOhJ1VlOQ
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