We are all travellers through time, and time is a linear entity that divides infinitely like a fractal as it progresses, going on into infinte possibilities, until we reach the end of our life. Time is said to be "linear" because it has two ends (a starting point and an end), but that doesn't mean there is movement in only one direction (to the future). On the contrary, there are three ways to travel "back in time" using intense yoga meditation, or gravity wave generators to open holes in space-time, or by using high-frequency contra-rotating magnetic fields to alter your quantum tone. "Time travel" is therefore not really going into the past that you know, but to a different past in another possibility vector fractal that has already been created before you time travelled, which is why you can't erase your existence by killing your grandmother. You will blot out your existence in THAT particular fractal vector, but the fractal that you came from will still exist in another dimensional plane.
What does this have to do with death, you ask? By our limited observations, death seems like the end of an organism's existence because of our ignorance of the infinite realites that are created at every nanosecond in those other time lines that branch off in all of those different directions in every organism's lifeline. From our linear perspective of time (which is one dimensional, a "line"), if there is existence after death, then it must be in "zero dimensions", i.e. your further "existence" must occupy only and only that single moment when you die, i.e. a single point in space-time. That may seem like no existence to us, but in fact, it IS a dimension, and where there is a dimension an entity can exist in it.
Take a black hole, for instance. The singularity at the very center is infintely compacted star matter, so compact that it doesn't occupy space. In fact, it is matter that occupies a single point in space time...not an atom's width, not even an electron's width...no size at all. It is a single mathematical hypothetical point in space time that the entire mass of a former star occupies. Inside a black hole, the hypothetical becomes reality because reality as we know it is turned inside-out. Starting at the rim of the event horizon, which is the distorted "space" around the singularity that can extend for quite a distance around the center, the three space dimensions are turned into one dimension (a line going straight towards the black hole) and time turns into three dimensions, acting like the fractal entity that I described earlier that branches off. If you could somehow retain your mind inside the event horizon, you would see multiple selves at different times since you entered the event horizon. All of your selves would be travelling towards the center, but the funny thing is you wouldn't be able to percieve that any of you are travelling towards any center at all because you're only in one space dimension, i.e. you would be a "point" on a "line" which you can't see outside of.
The black hole is a glimpse of what space and time become at the death of a star. Likewise, when organisms die, they occupy the same dimensional situation, a mathematical point in space time that is a universe unto itself. What happens in that universe would be based on what the organism did during its lifetime, and what its many other dimensional selves did as well. I hypothesize that since all of the fractal branches of an organsim will eventually have to die in every dimension, the death times of the organsim across these dimensions are united because they are the same kind of dimension ("zero dimension"). That means that the entity will enjoy going back and forth over his many different selves, playing out each fractal branch, and even be able to make new ones in other dimensions, "continuing" his life in totally new possibility vectors that perhaps even branch out backwards to before his birth.
The only thing that makes us different from animals is our language ability, which gives us the illusion of a "soul", and hence people came up with ideas of an afterlife in a heaven or a hell where your "soul" will be either punished or rewarded. That is simply false. When we die, and when any organism dies, there is no heaven nor hell, but rather new dimensions that touch other dimensions and ad infinitum into infinity, and by travelling through these an arganism evolves in the other planes.
"Zero dimension" is a dimension, and it is a door to the other zero dimensions, which are linked to every linear fractal vector in every dimension, hence death is a door.
Shalom