No body lives forever (are you your body? are you your mind?), tragedy results from all those who try.  From the Chinese Emperor who drank mercury, to Gilgamesh the world's first hero myth, to computer genius Ray Kurzweil consuming over 200 pills a day so afraid to die, as he aims to stuff himself into a computer - all tried for immortality - all failed. The cells of the human body that refuse to die, have a name, cancer...