One of the things that has always intrested me was the metaphysical theroy of time.
According to metaphyics, time runs on a loop of sorts oppest to being complete linear as people tend to look at time today. It is instead beleived that the past, present and future, all exisist simotenously, but on different planes.
They see the eart as being made up of different waves of energy, and what we call the present, is only "our" present, that is, what is happening around us, just so happens to be the wave length we are currently on, and the things of the so called past, and future are happening on different wave lengths that are outside our ablity to experince, sense or see.
This is also used a possible theroy for some haunting experinces, in which some theory suggests, that when a person sees a ghost, they are in fact getting a glimpse through the viel and acutally seeing into the past, which is happening in the same place at the same time that you are living your own life, but on rare ouccrances the two might acutally connect if only breifly.