The multiverse theory suggests that there are multiple universes that do not interact with each other. There are various theories on how the multiverse works, and some argue that there is only one universe. Proponents of the theory draw from quantum physics, while critics also use the same branch of physics. The concept of a multiverse is popular in science fiction and fantasy.
Some theorists believe we live in what’s known as a multiverse, a set of universes that don’t appear to interact with each other. This theory is just one of many used to explain the mysteries of the cosmos, with some people avidly arguing, while others argue that the multiverse theory doesn’t hold water, and that there is in fact only one universe: the one in which we live. The idea of the multiverse is so appealing that the concept has been used extensively in science fiction and fantasy.
While some scientists may agree on the theory of the multiverse, they can’t always agree on how the multiverse actually works. There are a number of competing theories to suggest how the multiverse is organized and what its properties might be. Some theorists suggest that the multiple possible universes are all the result of cosmic splits made in response to important choices, while others propose the idea that the multiverse is related to the singularity at the center of black holes. These theories are just two of many, so it’s easy to see how complex multiverse theories can become.
According to most proponents of some form of multiverse theory, multiple universes do not and perhaps cannot interact with each other. In the case of parallel universes, which include the same people, places, and creatures, the interaction could cause serious problems, as people have encountered their parallel selves. In other cases, universes within a multiverse may be incompatible with each other, so if people try to cross over, they won’t be able to or will die once they get there.
Researchers supporting the multiverse theory have put forward a number of supporting arguments, many of which are drawn from quantum physics, a branch of physics designed to deal with complex theoretical material. Equally valid criticisms of the theory are also drawn from this branch of physics, illustrating the many ways in which knowledge can be used, at least in this universe.
Authors sometimes find the concept of a multiverse immensely appealing. In science fiction and fantasy, a multiverse can add spice to the fantastical, allowing characters to explore wholly alien or eerily familiar worlds as the story progresses. Typically, novelists ignore the generally held notion that universes within a multiverse don’t interact with each other, in favor of using the crossroads between universes as a plot device.
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