@Punk: But if you does not experience death, how could you know when you pass through it? If this hypothesis is correct you are always dying and slipping to other universes. Even in this universe we cannot be sure when our consciousness started. When we look back to our conscious life we just see a lot of noise. It's just like a game architect sets the background as a dangling carrot around the player, you always see the background but it moves at same rate as you move. Subjectively speaking your consciousness "start" does not matches with your birth. Same thing when you think about your death, if you pay attention your birth is just a weird event as your future death. You just can talk about your birth and your death as a third person event. That's exactly how a game background works, just to give you an illusion of perspective to a specific level (or universe). It does not matter where you came from or where you going, just interact with the things inside your reach. Same thing happens in our dreams too, we always start in a dream doing something, in my case I usually start in a dream in walking mode. But in dreams we are more interested in the instant action, rarely we stop to think from where we came from or to where we'll go. Try to emulate this mindset to your waking life and you'll enjoy a very good life.
@EOM: We could slip to a universe where the old age was eradicated just in time to you get the cure.
Travel in time in one universe seems to be pretty impossible. But we can travel back or forward by slipping into a universe identical to this one, but with a different time frame. So we can travel in time by travelling through universes. I tend to be sympathetic with the hypothesis of memory being a kind of mind travel through universes.
And for those who think is impossible to exist such vast number of universes, there's a hypothesis that says just a lonely electron can produce an entire universe. Search about one-electron universe.