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  2. Multiverse - Wikipedia

    en.wikipedia.org/wiki/Multiverse

    In looking at this concept, we need an open mind, though not too open. It is a delicate path to tread. Parallel universes may or may not exist; the case is unproved. We are going to have to live with that uncertainty. Nothing is wrong with scientifically based philosophical speculation, which is what multiverse proposals are.

  3. Parallel universe - Wikipedia

    en.wikipedia.org/wiki/Parallel_universe

    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

  4. Space's Deepest Secrets - Wikipedia

    en.wikipedia.org/wiki/Space's_Deepest_Secrets

    An investigation into whether parallel universes exist and the possibility of traveling through time and space to reach them. This special consists entirely of segments previously aired as part of the Space's Deepest Secrets episodes "The Time Travel Enigma" (Season 4, Episode 1) and "The Truth Behind Parallel Universes" (Season 1, Episode 12).

  5. Wormhole - Wikipedia

    en.wikipedia.org/wiki/Wormhole

    The possibility of communication between parallel universes has been dubbed interuniversal travel. [62] Wormhole can also be depicted in a Penrose diagram of a Schwarzschild black hole. In the Penrose diagram, an object traveling faster than light will cross the black hole and will emerge from another end into a different space, time or universe.

  6. Theory of everything - Wikipedia

    en.wikipedia.org/wiki/Theory_of_everything

    [5] [6] [7]: 842–844 The two theories are considered incompatible in regions of extremely small scale – the Planck scale – such as those that exist within a black hole or during the beginning stages of the universe (i.e., the moment immediately following the Big Bang). To resolve the incompatibility, a theoretical framework revealing a ...

  7. M-theory - Wikipedia

    en.wikipedia.org/wiki/M-theory

    This construction describes a hypothetical universe with only two space dimensions and one time dimension, but it can be generalized to any number of dimensions. Indeed, hyperbolic space can have more than two dimensions and one can "stack up" copies of hyperbolic space to get higher-dimensional models of anti-de Sitter space. [52]

  8. Hyperspace - Wikipedia

    en.wikipedia.org/wiki/Hyperspace

    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.

  9. Cosmic censorship hypothesis - Wikipedia

    en.wikipedia.org/wiki/Cosmic_censorship_hypothesis

    Still, in the absence of naked singularities, the universe, as described by the general theory of relativity, is deterministic: [1] it is possible to predict the entire evolution of the universe (possibly excluding some finite regions of space hidden inside event horizons of singularities), knowing only its condition at a certain moment of time ...