Is it possible to travel to an alternate universe

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Although it does solve many potential paradoxes, branching time travel cannot be used to make sense of every time travel story—even ones that explicitly try to explain their plot with the branching view. Take the second Back to the Future. Doc and Marty then use it to return to Hill Valley in —only to find that it is now a lawless, dystopian wasteland. Learn more about The Matrix and the value of knowledge.

To make sense of other stories, the branching theory has to be tweaked a bit. Take Donnie Darko , for example. Somewhat thankful to be alive, he continues to live his life, falling in love with a girl named Gretchen. But his meeting her, ultimately—although accidentally—leads to her death.

Our universe grew exponentially in the first moments of its existence, but was this expansion uniform? If not, it suggests different regions of space grew at different rates — and may be isolated from one another. How are the laws of the universe so exact? Some propose that this happened only by chance — we are the one universe out of many that happened to get the numbers right.

What is beyond the edge of the observable space around us? No one knows for sure, and until we do which could be never , the thought that ou universe extends indefinitely is an interesting one.

There is no way for us to ever test theories of the multiverse. We will never see beyond the observable universe, so if there is no way to disprove the theories, should they even be given credence? Sometimes, the simplest ideas are the best. Some physicists argue that we don't need the multiverse theory at all. It doesn't solve any paradoxes, and only creates complications. Not only can we not disprove any multiverse theory, we can't prove them either. We currently have no evidence that multiverses exists, and everything we can see suggests there is just one universe — our own.

Countless works of myth and fiction draw from ideas of parallel universes and the multiverse. Overlapping worlds make appearances in Norse mythology as well as Buddhist and Hindu cosmology. The idea of multiple universes coming into contact showed up in print as early as Edwin A. Nearly every "Star Trek" series incorporates some form of mirror universe, and the reboot film starring Chris Pine and Zachary Quinto took subsequent "Star Trek" movies into an entirely new timeline that explicitly branches off from the original series.

And comics, as well as their corresponding movies, delve deeply into the idea of parallel worlds. Recent Marvel Comics' storylines both film and in print , DC's Flashpoint arc and 's "Into the Spider-Verse" all explore multiple universes and the intersections between them.

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