Humans have a unique perspective when it comes to dealing with time. Unlike other beings on Earth (and perhaps other beings, not on Earth), we are aware of time and how it passes, second by second, day by day. Its a linear process that only moves forward. However, that is just how we perceive time. Time is a human creation and the rest of the Universe may not work that way. Instead, everything that has already happened and will happen exists somewhere, we just cant see it. Think of reality as a film strip and consciousness as the light that makes the picture appear on the screen. When a frame isn't in front of the light, it doesn't mean that the frame doesn't exist anymore, we just cant see it. Time and reality work the same way, just because we cant see the past or the future does not mean they dont exist. What does that mean for death? Well, it is an illusion because you never really die. You always exist in those frames, its just you and other humans are unaware of it because of the way we perceive time. One scientific theory that supports death is an illusion is Biocentrism. Biocentrism is the theory that the world is created more in our head than it really exists. Our brain uses 20 watts of energy, but yet it takes in so much information and creates what we think is reality. Time is just a tool we use to process all that information, but it does not really exist. Going back to the filmstrip analogy, reality is a stack of individual micro-second frames and in order to comprehend them our minds string them together and view them individually. Therefore, we never really die because we always exist on some frame... just outside of our consciousness.