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Message: <blockquote data-quote="Raven Crowking" data-source="post: 3644961" data-attributes="member: 18280">Time TravelGeneral PrinciplesPeople tend to think of time as a linear sequence of cause and effect, but from an objective outside perspective four-dimensional time appears more like a “ball” of temporal energies with causal links that travel in all directions.  The Space-Time Vortex touches every point in this “ball”, connecting the entire universe holistically.  The Time Lords view time as consisting of two temporal dimensions – the standard fourth dimension of Time and a fifth dimension of temporal “Space”.  When a time traveller becomes entangled in space-time, his “present” is determined by events on both the 4th- and 5th-dimensional axis.  This is why time travellers can become entangled in events.  It also means that events occurring to a group of time travellers that are within two or more separate time zones tend to happen at the same temporal rate.  This is why the 5th Doctor in Mawdryn Undead, was so insistent that events happening in two different time zones were also occurring in the “present” (although he lacked the means to explain to the Brigadier why this was so).  It is also why the Doctor’s granddaughter, Susan, insisted that certain problems couldn’t be solved without recourse to a 4th dimension of “Time” and a 5th dimension of “Space”.  A very entangled example of this is seen in the 10th Doctor episode, Blink, where various characters move throughout time and space (all on the planet Earth) while contributing to the ultimate solution to a problem.Time Tracks:  From a four-dimensional viewpoint, time is not a seamless whole.  It began at the big bang and proceeds outward toward the expanding universe in a number of discreet (but extremely narrow) layers not unlike a colossal onion.  Each of the layers represents a distinct moment of “present”.  Layered around these are an infinite number of parallel layers, representing parallel universes.  Each universe lies on its own “time track” within the expanding whole, but it is possible for a time traveller to jump tracks into a parallel universe.  This is especially possible when the traveller is in an area of time and space where the decisions that lead from one possible future to another are made.  In effect, this causes a “scratch” across the tracks that makes the barrier between possibilities thinner.It is also possible to merely “skip” a track – gaining a temporary window into a possible future that you cannot interact with because you are literally between distinct moments of “present” – before the elasticity of time pulls you back to where you belong.  This happened to the 1st Doctor and his companions in The Space Museum.  They were able to avert a potential future because they knew it only existed as a potential.Parallel Universes:  There are an infinite number of parallel universes.  Before the Time War, the Time Lords had the technology to jump from one universe to another with impunity.  However, after the Time War most of the parallel universes were sealed off.  While the Time Lords were able to repair any fractures in space-time caused by travel to parallel universes in the past, junctures where travel to a parallel is possible after the Time War should cause deep concern.The walls between universes are only semi-permeable in their natural state.  Objects passing from one universe to another create stresses.  Enough of these stresses can cause the walls to fail catastrophically, creating temporal rifts or even obliterating both universes.  They can also cause access to the Void.  It is suggested that Time Lords who discover access points to parallel universes do their utmost to seal the breaches as soon as possible.The Void:  This is the term Time Lords use for the spaces between time tracks, discreet moments of “present”, and parallel universes.  It is known to some as the Howling Worlds, and to others as Hell – an endless darkness without light, heat, hope, or apparent time.  Access to the Void should be avoided at all costs.  Some of the creatures imprisoned there were chained before the Big Bang, and all of them are inimical to living creatures.</blockquote>

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