A parallel universe, also known as an alternate universe, world, or dimension, is a plot device in fiction which uses the notion of a hypothetical universe co-existing with another, typically to enabl
Stereotypical sci-fi multiverse inhabited by a multitude of Wikipe-tans
Artistic representation of the concept of parallel worlds
Alternate history
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Alternate history is a subgenre of speculative fiction in which one or more historical events happen differently than they did in reality.
Parallel universes in fiction
…others from their home universe, thus enabling further character development, and to serve as a starting point for speculative fiction, particularly alternate history. One of the first science-fiction examples of a parallel universe is Murray Leinster's short story Sidewise in Time, published in 1934. Although…
A painting by Jakub Różalski depicts an alternative history of the 1920s in Scythe, in which rural peasants must contend with giant mechanical walking tanks.
Title page of the first Spanish-language translation of Joanot Martorell's Tirant lo Blanch (originally in Catalan)