Time Travel may not work as Teleportation, i.e., existence of the being from one space time would get delete and he/she would then re-appear with the exact same configuration in a different space and time, however, it may seem as teleportation for a stationary being.
My perspective towards time travelling, actually, space-time travelling is that, to ever do time travel or travel 4 dimensionally, we need to be in the 5th dimension. And in the 5th dimension, we would see the whole worldline of us, and other individuals as well. Notice, that here in the 5th dimension, we would not be in our physical form, i.e., not in our 3 dimensional form, we would be in a higher dimensional form of human body, which allow us to perceive each and every instant/moment of time.
In the 5th dimension, one would perceive infinite versions of him/herself from the past and maybe from the future as well. However, to change an event at the past, we would have to come to a lower dimension, we need to go to the 4th dimension (our previous dimension) from the 5th dimension, where we would travel 3 dimensionally. And that would not be possible for an individual. Just like, we cannot go to the 3rd dimension, where we would travel 2 dimensionally.
Even, if one did that, and tried changing the past, things would happen in certain order that would eventually be leading to the exact same future from which the traveler had come.
NO PARADOX AT ALL. TIME WOULD REMAIN CONSTRAINED FOREVER.
That's my perspective towards time travelling.
Dear Siddharth Rana Visualization, assumption, prediction and modeling of nature is not science. How could anyone can call three dimension of nature to four, five...dimension?
Dear Javad Fardaei the basic foundation of science comes from visualization, if one can visualize it, he/she can then make it happen.
Nature is 3 dimensional okay, but a 4th dimensional is needed to run this 3 dimensional nature, which, in our case, is time. Can you imagine nature without time? of course not.
For any event to occur, we "must" need 4 dimensions - 3 spatial to locate that event (Where) and plus 1 time to locate when the event happened.
Imagine, meeting a friend without telling him when to meet, you might end up at the exact same location but at different times (or vice versa).
Hence, nature is indeed 4 dimensional i.e., (3+1) dimensional.
However, I have presented this approach that beyond this 4 dimensional nature (which might not be perceivable for us while being in the 4th dimension) we would be able to travel 4 dimensionally, in time.
Good Luck!
Physical entities have objective reality and positive existence in space. Dimensions represent the extent of physical entities. Real entities have their spatial extents and their matter-content.
Unfortunately, we have no reference to measure matter-content of the material body. For this, we have to use certain properties of the material body.
To measure the extent of a real body, we may use the distance (separation)
between two points on the body.
Distance measurement along a straight line defines a single spatial dimension.
Distance measurements in a plane defined by two mutually perpendicular lines define the second spatial dimension.
Distance measurements in a volumetric space defined by three mutually perpendicular lines define the third single spatial dimension.
In order to have higher-dimensional spatial dimension, we should be able to partition the space by more number of mutually perpendicular lines.
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