This is not true and easily countered by any sort of investigation.
Lobsters, flatworms, immortal jellyfish and hydras are all believed to be immortal.
In fact we know how to live forever, control our telomeres. We know it works because cancer exists. We just can’t control it but controlled cancer is effectively immortality.
In fact we know how to live forever, control our telomeres. We know it works because cancer exists. We just can’t control it but controlled cancer is effectively immortality.