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  2. Four-dimensional space - Wikipedia

    en.wikipedia.org/wiki/Four-dimensional_space

    Four-dimensional space (4D) is the mathematical extension of the concept of three-dimensional space (3D). Three-dimensional space is the simplest possible abstraction of the observation that one needs only three numbers, called dimensions, to describe the sizes or locations of objects in the everyday world.

  3. Interdimensional UFO hypothesis - Wikipedia

    en.wikipedia.org/wiki/Interdimensional_UFO...

    The interdimensional hypothesis is a proposal that unidentified flying object (UFO) sightings are the result of experiencing other "dimensions" that coexist separately alongside our own [1] in contrast with either the extraterrestrial hypothesis that suggests UFO sightings are caused by visitations from outside the Earth or the psychosocial hypothesis that argues UFO sightings are best ...

  4. Time-traveler UFO hypothesis - Wikipedia

    en.wikipedia.org/wiki/Time-traveler_UFO_hypothesis

    The article goes on linking Hoover's story to other alleged UFO sightings and UFO abduction accounts with similar statements and reports about aliens actually being "humans of the future who have found the technology to overcome the limitations of light speed and time travel paradoxes that keep present day humans from breaching the boundaries ...

  5. Fourth dimension in literature - Wikipedia

    en.wikipedia.org/wiki/Fourth_dimension_in_literature

    Later in the novel, two interstellar ships enter a four-dimensional fragment of space. While within this fragment, the crew of the ships can enter the fourth dimension. From the fourth dimension, they can see the interior and all sides of any 3D object, much like how humans can see every aspect of a 2D shape from the third dimension.

  6. Four-dimensionalism - Wikipedia

    en.wikipedia.org/wiki/Four-dimensionalism

    Four-dimensionalism is a name for different positions. One of these uses four-dimensionalism as a position of material objects with respect to dimensions. Four-dimensionalism is the view that in addition to spatial parts, objects have temporal parts. [7] According to this view, four-dimensionalism cannot be used as a synonym for perdurantism.

  7. Close encounter - Wikipedia

    en.wikipedia.org/wiki/Close_encounter

    In a CE5 event, individuals or groups use specific protocols to establish communication or interaction with extraterrestrial beings. These protocols primarily involve the use of contact meditation and use of sounds or signals. Close encounters of the fifth kind is also referred to as human initiated close encounter. [17]

  8. Death's End - Wikipedia

    en.wikipedia.org/wiki/Death's_End

    Death's End (Chinese: 死神永生) is a science fiction novel by the Chinese writer Liu Cixin.It is the third novel in the trilogy titled Remembrance of Earth's Past, following the Hugo Award-winning novel The Three-Body Problem and its sequel, The Dark Forest.

  9. Flatland - Wikipedia

    en.wikipedia.org/wiki/Flatland

    Flatland: A Romance of Many Dimensions is a satirical novella by the English schoolmaster Edwin Abbott Abbott, first published in 1884 by Seeley & Co. of London. Written pseudonymously by "A Square", [1] the book used the fictional two-dimensional world of Flatland to comment on the hierarchy of Victorian culture, but the novella's more enduring contribution is its examination of dimensions.