Time travel is the concept of movement between certain points in time, relative to movement at any given point in space. It is uncertain if time travel to the past is physically possible, but forward time travel, outside the usual sense of the perception of time, is an extensively-observed phenomenon and well-understood within the framework of Albert Einstein’s theory of special relativity and general relativity. The 20th-century scientist developed the idea that space and time are really aspects of the same thing—space-time.
There is a speed limit of 300,000km per second (or 186,000 miles per second) for anything that travels through space-time, and light always travels the speed limit through empty space.
Special Relativity says that something unique happens when you move through space-time, especially when your speed relative to other objects is close to the speed of light.
Time goes slower for you than for the people you left behind, so you won't notice this effect until you return to those stationary people.
His conclusion:
Time travel is possible, but not into the past but only into the future!
Experiment:
See this experiment in following video:
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