There's actually a theory that says that in any moment that you died you get transferred to an alternative dimension. Theorethically, you live forever, as any universe has at least a chance of 1 to infinity for something to happen. Even dieing of old age or suiciding, or being murdered has an alternative dimension where you live for another second, and then you get transferred to that, and so on.
It's a nice thing, but I wonder what would happen if you would blow yourself up. Maybe another universe where human parts can be rebuilt and you get chosen for it by that one to infinity chance?
It makes you wonder. But at the same time, it doesn't sound impossible.