بغض النظر عن الرؤية التقليدية للحياة فان العلم يخبرنا بوجود كائنات خالدة لاتموت اي انها تعيش للابدية او
لملايين السنين اذا ما توافرت شروط الحياة من حولها ونحن هنا نتحدث عن كائنات عضوية (اوليات نوى - Prokaryotes )

بالصدفة وجدت مقال على الويكي ( غير متوفر بالنسخة العربية , قد اترجمه اذا سنح لي الوقت ) :

اقتباس:Bacteria

Bacteria are said to be biologically immortal, but only as a colony. An individual bacterium can easily die. The two daughter bacteria resulting from cell division of a parent bacterium can be regarded as unique individuals or as members of a biologically "immortal" colony. The two daughter cells can be regarded as "rejuvenated" copies of the parent cell because damaged macromolecules have been split between the two cells and diluted. In the same way stem cells and gametes can be regarded as "immortal".

Hydra

Hydras are a genus of simple, fresh-water animals possessing radial symmetry and no post-mitotic cells. The fact that all cells continually divide allows defects and toxins to be "diluted-away". It has been suggested that hydras do not undergo senescence (aging), and as such are biologically immortal[5]. However, this does not explain how hydras are consequently able to maintain telomere lengths.

Jellyfish

Turritopsis nutricula is a small (5mm) species of jellyfish which uses transdifferentiation to replenish cells after sexual reproduction. This cycle can repeat indefinitely, rendering it biologically immortal. It originates from the Caribbean sea, but has now spread around the world.

طبعا هناك جماعة من البشر يؤمنون بامكانية الوصول للانسان الخالد يوما ما , فهل يستطيع
العلم بالمستقبل اخذ الخواص الكيميائية (بطريقة ما ؟)التي تمنع هذه الخلايا من الشيخوخة ؟