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Parallel universe may refer to:

Science

• Many-worlds interpretation of quantum mechanics, which implies the existence of parallel universes
• Multiverse, the sum of all universes, e.g. everything that exists

Philosophy

• Possible world, a construct in metaphysics to bring rigor to talk of logical possibility
• Modal realism, an account of possible worlds according to which they are all just as real as the actual world
• Extended modal realism, the view that all worlds, possible as well as impossible, are as real as the actual world

Arts and media

• 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
• Alternative universe (fan fiction), fiction by fan authors that departs from the fictional universe of the source work

Literature, film, and television

• "Parallel Universe" (Red Dwarf), a 1988 TV episode
• Parallel Universes (film), a 2001 British TV documentary
• Mirror Universe (Star Trek), a fictional parallel universe in the Star Trek franchise

Music

• Parallel Universe (4hero album) or the title song, 1994
• Parallel Universe (Garnet Crow album), 2010
• Parallel Universe, an album by Plain White T's, 2018
• "Parallel Universe" (song), by the Red Hot Chili Peppers, 1999
• Parallel Dimensions (album), by Perseo Miranda, 2008

See also

• Metaverse, a collective virtual shared space
• Alternate reality (disambiguation)
• Multiverse (disambiguation)
• Otherworld
• Parallel World (disambiguation)

• Disambiguation pages