VIDEO: 6 Ways You Could Time Travel

Can you imagine how awesome it would be to be able to travel back and forth in time?! You could fix things and plan stuff more accurately!

Anyone can write on Evonews. Start writing!

While some people are thrilled by the idea, others realize that time travel would be a very sensitive issue and maybe even a dangerous practice.

The crazy thing is… it seems it is actually possible.

Here is some information on backward time travel in Physics, provided by Wikipedia.

Some theories, most notably special and general relativity, suggest that suitable geometries of spacetime or specific types of motion in space might allow time travel into the past and future if these geometries or motions were possible.

In technical papers, physicists discuss the possibility of closed timelike curves, which are world lines that form closed loops in spacetime, allowing objects to return to their own past. There are known to be solutions to the equations of general relativity that describe spacetimes which contain closed timelike curves, such as Gödel spacetime, but the physical plausibility of these solutions is uncertain.

Many in the scientific community believe that backward time travel is highly unlikely. Any theory that would allow time travel would introduce potential problems of causality.

The classic example of a problem involving causality is the “grandfather paradox”: what if one were to go back in time and kill one’s own grandfather before one’s father was conceived? Some scientists believe these sorts of temporal paradoxes can be avoided, by appealing either to the Novikov self-consistency principle or to a variation of the many-worlds interpretation with interacting worlds.

Time travel to the past is theoretically possible in certain general relativity spacetime geometries that permit traveling faster than the speed of light, such as cosmic strings, transversable wormholes, and Alcubierre drive.

The theory of general relativity does suggest a scientific basis for the possibility of backward time travel in certain unusual scenarios, although arguments from semiclassical gravity suggest that when quantum effects are incorporated into general relativity, these loopholes may be closed.

These semiclassical arguments led Hawking to formulate the chronology protection conjecture, suggesting that the fundamental laws of nature prevent time travel, but physicists cannot come to a definite judgment on the issue without a theory of quantum gravity to join quantum mechanics and general relativity into a completely unified theory.

The general theory of relativity extends the special theory to cover gravity, illustrating it in terms of curvature in spacetime caused by mass-energy and the flow of momentum. General relativity describes the universe under a system of field equations, and there exist solutions to these equations that permit what are called “closed time-like curves”, and hence time travel into the past.

The first of these was proposed by Kurt Gödel, a solution known as the Gödel metric, but his (and many others’) example requires the universe to have physical characteristics that it does not appear to have. Whether general relativity forbids closed time-like curves for all realistic conditions is unknown.