What is Wormhole?
[[File:LorentzianWormhole.jpg|thumb|right|Diagram of a Schwarzschild wormhole]] A '''wormhole''' is a [[Theory|theoretical]] passage through space creating a shortcut through [[time]] and [[Space (physics)|space]]. It is not known whether or not they exist.<ref>Focus: Wormhole construction: proceed with caution. ''Physics Review Focus'' 1998. '''2''', p7. [https://physics.aps.org/story/v2/st7]</ref> Scientists believe that if wormholes existed they could not be made following any traditional scientific methods. In order to hold a wormhole open, a form of theoretical exotic [[matter]] would be needed. Otherwise the wormhole would simply disappear very quickly after its creation. If plotted on a 2-dimensional plane, the wormhole bends the plane, like folding a paper, so that the two ends would be touching (as seen in the picture). The term wormhole was first used by [[John Wheeler]], a theoretical [[physicist]]. It is also known as an Einstein-Rosen bridge. A wormhole is much like a tunnel with two ends each in separate points in [[space time]]. Researchers have no observational evidence for wormholes. Wormholes are a common element in [[science fiction]] because they allow rapid interstellar, intergalactic, and sometimes even interuniversal travel. In fiction, wormholes have also served as a method for [[time travel]]. This popular fiction allows [[interstellar travel]] within human lifetimes. This would allow time travel, also a popular fiction.<ref>{{cite book |last1=Everett |first1=Allen |last2=Roman|first2=Thomas |title=Time travel and warp drives |url=https://archive.org/details/isbn_9780226224985 |publisher=University of Chicago Press |date=2012 |page=[https://archive.org/details/isbn_9780226224985/page/n182 167] |isbn=978-0-226-22498-5}}</ref> A proposed time-travel machine using a traversable wormhole would hypothetically work in the following way: One end of the wormhole is accelerated to some significant fraction of the [[speed of light]], perhaps with some advanced [[Vehicle propulsion|propulsion sys