Let us all think for a while... what is time?

In theory, time is linear for it moves only one way, forward and as we all know it, the hand on the clock will never move back.

In Einstein's theory,

Albert Einstein's theory of relativity suggests that time slows down when travelling near the speed of light. So, if an object travelled at the speed of light (300,000,000 m/s) then time would stop completely. Just like in a photograph. Exceeding the speed of light may cause the whole process of travel to revert itself, and you would actually be traveling backwards in time. At this point, it is impossible to reach the speed of light since we are merely living in a prehistoric world compared to the 'man-made' future. At this point, the only known substance that can achieve this feat is the Tachyon

  As of today, Tachyonic Acceleration is the only way to travel through time. Accelerating the Tachyons past the speed of light would result in a backwards time motion. But, tachyons are not people. We have to travel in something to get anywhere. The machine that will take us to the past or the future needs some consideration. It hasn't been built yet. Of course, there is the exception such as dimensional rifts. What if that dimensional rift existed? How do we find it? Where is that Vortex to propel one into the past or future?

Some scientist believed that Einstein's theory of relativity is slightly wrong. As Einstein stated, that nothing can go beyond the speed of light because the friction generated will decentigrate anything at that speed. However, it is found that the human mind, or human impulses are able to close that speed, and if enhanced, the possibllity of seeing to future!- the nearest we can get to time travel.