All you people are under the assumption that to travel interdimensionally, speed faster than the speed of light must be accomplished, but this is not so. Sound is an energy far greater than light in that it is only sound that holds everything together and gives it form. Imagine that this Universe is not the only one, and that we exist in a "Multiverse". When a person dies, we undergo a change from this physical state to a metaphysical one, into a form of pure energy. We can cause this change artificially by emitting a certain sound frequency at something so that it drops out of this physical realm into the metaphysical. In this metaphysical state, space and time do not exist, making it possible to travel vast distances without movement. This is how teleportation works, and our government has been experimenting with it since Nikola Tesla showed them how in the 40's! He himself did not believe in Einsteins Theory of Relativity, and several of his works proved his own personal theory of existence. Why do you think his name is never mentioned in regular everyday educational establishments? You have to be an Electrical Engineer or do your own research to know who he is and his extreme significance to America's standard of living. By Tesla's own admittance, some of the knowledge he attained is far too dangerous for the general public to know.

Hmmm...

everyone replying to this post espouses the conundrum of "you can't travel faster that the speed of light". Let me briefly prove that both travel faster than the speed of light, and travel in time is commonplace...

Facts:

1. An single electron fired at a phosphorous screen through a diffusion screen make multiple impacts on the phosphorous screen (Stephen Hawking - A brief History of Time)

2. Light can be considered composing of either particles or a wave, depending on the equation. It behaves as if it is both.

3. Atomic clocks in GPS Satellites have to be adjusted for gravity as time travels slower the further they are from the gravitational pull of the earth (Time dilation effect)

Result.

Light is made of photons particles traveling above the speed of light, this causes them to loop in time and exist simultaneously. The resultant view is a waveform traveling at light speed.
QED

I don't know who wrote all that up there, but that's not how the technology would or could work. There are no "portals" you as a person can travel through because you would need a substantial amount of anti-matter to maintain control of the wormhole's mouth. The energy required to accumulate enough anti-matter to serve this function is more than the entire energy mankind has been able to exploit and yield in his entire history.

If time travel were achievable, it would have to be done through some kind of mechanism to repel gravity at the atomic level. Not simply propel against gravity, man has already achieved that, but repel to it the point of turning it into a negative variable. Humans only experience time the way they do because they have evolved within the level of gravitational force experienced on Earth. This is the reason time ceases to function at the event horizon of a black hole, where if one could conceivably get close enough one could witness the entire span of the universe pass along like a river flow, because the gravity has not only become incredibly dense due to the star's collapse, but it has reached a point of being what can only be described as negative gravity. The only way to possibly achieve negative gravity would be through the proper application of electromagnetic energy, i.e. a massive particle accelerator.