There's been a lot of talk in the last couple of years about the possibility of gaining immortality by downloading one's consciousness into some information-storing medium like a computer chip which could then be implanted into another body of some sort.
It sounds interesting given the technological advances in computer power that've been made in recent years, but as the following 11 minute video points out the obstacles to downloading the contents of one's brain in such a way that the self remains intact are more than daunting.
The narrator of the video, which was recommended to me by one of my students, seems to have a tongue-in-cheek optimism about the prospects of digitizing the brain. There's no reason to think it can't be done, he seems to imply, but as the video proceeds the viewer realizes that the whole point of the video is to show that, in fact, it could never be done.
In addition to all the fascinating technical difficulties that preserving one's consciousness involves there's another major problem that the video doesn't address. The video assumes that the brain is all that's involved in human consciousness, but it's by no means clear that that is so.
Many philosophers are coming to the conclusion that, in addition to the brain, human beings also possess a mind that somehow works in tandem with the brain to produce the phenomena of conscious experience. If this is correct then the problems entailed by downloading the data that comprise the physical brain are child's play compared to the difficulties of downloading an immaterial mind.
Maybe the only way to gain immortality is the old-fashioned way, the way that involves the God that your grandparents told you about.