Immortality is the concept of eternal life.

Some species possess biological immortality due to an apparent lack ofthe Hayflick limit(The number of times a normal somatic differentiated human cell population will divide before cell-division stops)...

Since ancient times, people believe that Gods may be physically immortal, and that this is also a state that the gods at times offer humans.

According to Christian beliefs,Yahweh will resurrect the dead during the end times.

'What form an undying human being or lifeform would take?' is a question that continues to be a mystery shrouded in the mist of ignorance and unavailable data.

Even if an immaterial soul exists somewhere,it will remain a secret.

Only a fool would reveal he is immortal(If it is the truth).