There is no way to become immortal because, at the end of each chromosome lays a set of DNA consequences called "teleomres". One of the missions of these telome

There is no way to become immortal because, at the end of each chromosome lays a set of DNA consequences called "teleomres". One of the missions of these telomeres is to fix the chromosome (DNA, to be specific) itself from the damages that result from cell divisions (in average, 1 million cells die in our body every second and the need to be replaced). Put it simply, telomeres are the mechanics of the chromosomes. The problem is this: by time, cell divisions also damage the telomeres themselves, and nothing can fix them: hence the fatal thing (cancer) is a matter of time to occur.