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Line 1: − + − + − The General Theory of Relativity predicts that wormholes exist, and some theoreticians predict that this would enable time travel. + Line 12:
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Explained time travel; added white holes; added category
A '''wormhole''', in [[science fiction]], is a passage from one location in three-dimensional space to another. It is based on the concept that space has more than three dimensions, and that 3D space can be "folded" within 4D space much as a 2D piece of cloth can be folded within 3D space.
A '''wormhole''', in [[science fiction]], is a passage from one location in three-dimensional space to another. It is based on the concept that space has more than three dimensions, and that 3D space can be "folded" within 4D space much as a 2D piece of cloth can be folded within 3D space. The [[General Theory of Relativity]] says that wormholes may exist.
The significance of a wormhole is that it would allow a trip through it to take much less time than a journey between the same two points in conventional space.
The significance of a wormhole is that it would allow a trip through it to take much less time than a journey between the same two points in conventional space. The mouths of a wormhole may be at any two points in [[spacetime]], including at different times; this would allow time travel by going through the wormhole.<ref>[http://www.npl.washington.edu/AV/altvw33.html "Wormholes and Time Machines"], John G. Cramer</ref>
Some scientists speculate that [[black holes]] might be entrance portals to wormholes, leading to hypothetical [[white holes]].
The first prediction of a wormhole was made by physicist Hermann Weyl in 1921, and physicist John Wheeler coined the term “wormhole” in 1957.<ref>http://www.astronomyexpert.co.uk/Wormholes.html</ref> Its relatively unattractive name has probably hurt its popularity and interest level among the general public.
The first prediction of a wormhole was made by physicist Hermann Weyl in 1921, and physicist John Wheeler coined the term “wormhole” in 1957.<ref>http://www.astronomyexpert.co.uk/Wormholes.html</ref> Its relatively unattractive name has probably hurt its popularity and interest level among the general public.
[[Category:physics]]
[[Category:physics]]
[[Category:Science fiction]]
[[Category:Science fiction]]
[[Category:Relativity]]