<diacritize> Dokita Leonard Hayflick so ninu iwe re , How and Why We Age , pe : Lodun 1900 , ipin marundinlogorin ninu ogorun - un eeyan ni United States lo n ku ki won to pe omo odun marunlelogota . <yor>Dókítà Leonard Hayflick sọ nínú ìwé rẹ , How and Why We Age , pé : Lọdún 1900 , ìpín márùndínlọgọrin nínú ọgọrùn - ún èèyàn ní United States ló ń kú kí wọn tó pé ọmọ ọdún márùnlélọgọta . 