Why do our bodies start to stop functioning as we age? Why can’t our bodies maintain a “youthful” appearance and function?
In: Biology
Well, that’s asking for an unknown. There are a lot of theories about this, ranging from telomeres running too short effectively repair DNA (the surplus DNA material at the end of your chromosomes), to radiation of all sorts (not just radioactivity) effectively damaging cells as they multiply and causing the damaged cells to be the new model for further mitosis (cell division).
As far as I can tell, there is currently no “known” answer to your question, only difficult-to-prove theories.
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