Time travel is the notion of moving between different points in time by an item or a person, similar to moving between different points in space by an object or a person, usually using a hypothetical equipment called a time machine. In philosophy and literature, particularly science fiction, time travel is a well-known notion. H. G. Wells' 1895 novel The Time Machine popularised the concept of a time machine.
Is it possible to travel through time? Yes, and you're doing it right now, speeding into the future at an incredible pace of one second per second. Whether you're watching paint dry or wishing you had more hours to chat with a buddy from out of town, you're pretty much always going through time at the same speed.
But this isn't the type of time travel that has attracted numerous science fiction writers and spawned a genre so large.
However, science does allow for some time travel. The theory of special relativity proposed by scientist Albert Einstein, suggests that time is an illusion that shifts relative to an observer. Time, with all its aftereffects (boredom, ageing, etc.) will be experienced considerably more slowly by an observer travelling near the speed of light than by an observer at rest. That's why, after a year in space, astronaut Scott Kelly aged somewhat slower than his identical brother who remained on Earth.
Other scientific hypotheses concerning time travel exist, such as some strange physics involving wormholes, black holes, and string theory.
Posted By InnoTechzz