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Another common term for a parallel universe is "another dimension", stemming from the idea that if the 4th dimension is time, the 5th dimension—a direction at a right angle to the fourth—is a direction into any of the alternative spacetime realities. Fiction has long borrowed an idea of "another world" from myth, legend and religion.
This is an accepted version of this page This is the latest accepted revision, reviewed on 16 February 2025. Hypothetical group of multiple universes Not to be confused with Metaverse. "Multiverses" redirects here. Not to be confused with MultiVersus. For other uses, see Multiverse (disambiguation). Part of a series on Physical cosmology Big Bang · Universe Age of the universe Chronology of ...
Alternate reality (or Alternative reality, UK English) often refers to parallel universes in fiction, a self-contained separate world, universe or reality coexisting with the real world, which is used as a recurring plot point or setting used in fantasy and science fiction. Alternate reality may also refer to:
Parallel universes in fiction, a hypothetical self-contained plane of existence, co-existing with one's own; Alternate history, a genre of fiction in which historical events differ from reality
Another example of a sub genre of the alternative timeline story is called a "do-over fiction", similar to "fix-it fiction" in which consequences of an event are undone, but in do-over fictions particularly the entire story is reset to the beginning, and the author creates an alternate timeline that diverges from the original canon of the work. [2]
In science fiction, hyperspace (also known as nulspace, subspace, overspace, jumpspace and similar terms) is a concept relating to higher dimensions as well as parallel universes and a faster-than-light (FTL) method of interstellar travel. In its original meaning, the term hyperspace was simply a synonym for higher-dimensional space.
It was also revealed that the series Generator Rex takes place in an alternate dimension or timeline. Bismark universe "The Space Adventurers" (Bismark) 1984 Original TV series later adapted into Saber Rider and the Star Sheriffs in North America. In the original Bismark series, a scientist created the international starship Bismarck to fight ...
An analysis of results from the Large Hadron Collider in December 2010 severely constrains the black holes produced in theories with large extra dimensions. [11] The recent multi-messenger gravitational wave event GW170817 has also been used to put weak limits on large extra dimensions. [12] [13]