Our Universe started with a big bang and at that instant the main ingredients of the universe were created, which are known as space-time. Space has three dimensions and time has only one dimension. Since space has three dimensions, we can go in three directions left, right and up or at any point in space but on the other hand time has only one dimension due to which we can go in only one direction in time with a constant rate, which is future. However, there remains a question that can we travel to any point in time like we can go anywhere in space? Is time travel possible? The short answer is “yes”. Time Travel Time is one of the great mysteries of the universe. We are all swept up in the river of time against our will. Time travel has been the main topic for science fiction writers. But the first serious attempt to explore time travel in fiction was H. G. Wells’s classic The Time Machine, in which the hero is sent hundreds of thousands of years into the future. In that distant
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