Wormholes in fiction

Last updated

Wormhole travel as envisioned by Les Bossinas for NASA.jpg
Artist's impression of wormhole travel
Located in Space
Created by EinsteinRosen
Genre Science fiction
Classification Pseudo-scientific fiction
First proposed1916

An EinsteinRosen bridge, or wormhole, is a postulated method, within the general theory of relativity, of moving from one point in space to another without crossing the space between. [1] [2] [3] [4] Wormholes are a popular feature of science fiction as they allow superluminal interstellar travel within human timescales.[ citation needed ]

A related concept in various fictional genres is the Portable hole. While there's no clear demarcation between the two, this article deals with fictional, but pseudo-scientific, treatments of faster-than-light travel through space.

In franchises

Stargate franchise

Wormholes are also the principal means of space travel in the Stargate movie and the spin-off television series, Stargate SG-1 , Stargate Atlantis and Stargate Universe . The central plot device of the programs is an ancient transportation network consisting of the ring-shaped devices known as Stargates, which generate artificial wormholes that allow one-way matter transmission and two-way radio communication between gates when the correct spatial coordinates are "dialed". However, for some reason not yet explained, the water-like event horizon breaks down the matter and converts it into energy for transport through the wormhole, restoring it into its original state at the destination. This would explain why electromagnetic energy can travel both ways — it doesn't have to be converted. The one-way rule may be caused by the Stargates themselves: as a Gate may only be capable of creating an event-horizon that either breaks down or reconstitutes matter, but not both. It does serve as a very useful plot device: when one wants to return to the other end one must close the original wormhole and "redial", which means one needs access to the dialing device. The one-way nature of the Stargates helps to defend the gate from unwanted incursions. Also, Stargates can sustain an artificial wormhole for only 38 minutes. It's possible to keep it active for a longer period, but it would take immense amounts of energy. The wormholes generated by the Stargates are based on the misconception that wormholes in 3D space have 2D (circular) event horizons, but a proper visualization of a wormhole in 3D space would be a spherical event horizon.[ citation needed ]

Babylon 5 and Crusade

In television series Babylon 5 and its spin-off series Crusade , jump points are artificial wormholes that serve as entrances and exits to hyperspace, allowing for faster-than-light travel. Jump points can either be created by larger ships (battleships, destroyers, etc.) or by standalone jumpgates. The more energy used to create the wormhole, the larger the opening will be, so the stand-alone gates are used for heavily trafficked, predetermined interstellar routes, while engines on ships serve as a means of travel primarily for that ship and its support vessels, allowing them to enter and exit hyperspace where a jumpgate is not conveniently close by in normal space.[ citation needed ]

Three distinct types of wormhole are characterized in the series and its sequel stories.

The jump points created by both the jumpgates and large vessels characterize a Lorentzian traversable wormhole with intra-universal endpoints. In the series, however, rather than the exiting endpoint being defined at the time of entry, the ship enters non-Euclidean hyperspace within which tachyon beacons mark possible endpoint destinations in real space. A ship may enter hyperspace with no particular destination, linger or hide there before returning to normal space, even be lost irretrievably should it become unable to exit into normal space.[ citation needed ]

The second type of wormhole depicted in the series is temporal in nature, as when the Great Machine buried miles below the surface of Epsilon Eridani III, a massive alien complex for the generation and control of power on a solar scale, displaces Babylon 4 1000 years into the past, 24 hours after it becomes fully functional, taking Commander Sinclair with it into the past to begin preparations a millennium in advance for the coming war with the Shadows, creating a temporal paradox.[ citation needed ]

The third type of wormhole appears in the series sequel Babylon 5: Thirdspace , as an ancient Vorlon artifact is found drifting in hyperspace and is recovered and brought back into normal space. The device is revealed to be a jumpgate for the creation of an extra-universal Lorentzian wormhole, which opens into a universe dominated by an incredibly powerful and ruthlessly violent alien race.[ citation needed ]


The television series Farscape features an American astronaut who accidentally gets shot through a wormhole and ends up in a distant part of the universe, and also features the use of wormholes to reach other universes (or "unrealized realities") and as weapons of mass destruction.[ citation needed ]

Wormholes are the cause of John Crichton's presence in the far reaches of our galaxy and the focus of an arms race of different alien species attempting to obtain Crichton's perceived ability to control them. Crichton's brain was secretly implanted with knowledge of wormhole technology by one of the last members of an ancient alien species. Later, an alien interrogator discovers the existence of the hidden information and thus Crichton becomes embroiled in interstellar politics and warfare while being pursued by all sides (as they want the ability to use wormholes as weapons). Unable to directly access the information, Crichton is able to subconsciously foretell when and where wormholes will form and is able to safely travel through them (while all attempts by others are fatal). By the end of the series, he eventually works out some of the science and is able to create his own wormholes (and shows his pursuers the consequences of a wormhole weapon).[ citation needed ]

Star Trek

Doctor Who

It is discussed that the Time Vortex was created by the Time Lords (an ancient and powerful race of human-looking aliens that can control space and time and the protagonist is one of them) to allow travel of TARDISes (Time And Relative Dimension In Space) to any point in spacetime.[ citation needed ]

Marvel Cinematic Universe

In literature

In some earlier analyses of general relativity, the event horizon of a black hole was believed to form an Einstein-Rosen bridge. Works envisioning black holes as wormholes are listed in Black Holes as Wormhole Bridges. [6] [7]

"The Meteor Girl" Jack Williamson 1931In the short story the protagonist creates a "distortion of space-time coordinates" from the effect scientific equipment has on a recently crashed meteor – which is energized with a mystery force. He uses the window in space-time and his knowledge of Einstein's relativity equations to rescue his fiancée from a shipwreck four thousand miles away and twelve hours and 40 minutes in the future. [8] [ better source needed ]
A Wrinkle in Time Madeleine L'Engle 1963In the young-adult novel the process by which the characters travel through space and time is explained in a manner similar to the wormhole theory. Say an ant wants to get from one part on a tablecloth to another some distance away; it is a lot quicker to just "wrinkle up" the space between them so that the two points touch, and travel directly from one to the other. Tesseracts are used for this transportation. [9]
The Forever War Joe Haldeman 1974In the classic war novel interstellar travel is achieved through gateways located at collapsars. This is an early word for a black hole, and the novel refers to the (now obsolete) theory that black holes may contain Einstein–Rosen Bridges. [10]
Contact Carl Sagan 1985In the novel a crew of five humans make a trip to the center of the Milky Way galaxy through a transportation system consisting of a series of wormholes. The novel is notable in that Kip Thorne advised Sagan on the possibilities of wormholes. [11] Likewise, wormholes are also central to the film version. [12]
Vorkosigan Saga Lois McMaster Bujold 1986In the series naturally occurring wormholes form the basis for interstellar travel. The world of Barrayar was isolated from the rest of human civilization for centuries after the connecting wormhole collapsed, until a new route was discovered, and control over wormhole routes and jumps is the frequent subject of political plots and military campaigns.[ citation needed ]
Xeelee series Stephen Baxter 1989In the fictional world human beings use wormholes to traverse the solar system. [13] A wormhole is also used in this universe to put a probe into the sun (the wormhole is utilized to cool the probe, throwing out solar material fast enough to keep the probe at operating temperatures). In his book Ring, the Xeelee construct a gigantic wormhole into a different universe which they use to escape the onslaught of the Photino birds.
Honorverse series David Weber 1994In this fictional universe, wormholes have an important impact in the economy of the different star nations, as it greatly reduces travel time between two different points. The Star Kingdom of Manticore, to which the main character belongs, is a powerful economic entity thanks to the Manticore Junction, a set of six (a seventh being discovered during the course of the books) wormholes, close to Manticore's binary system, that ensure much travel goes through their system. It also can play a role in the military side of things, but usage of the wormhole destabilizes it for a time proportional to the size of the starship using it.
His Dark Materials Philip Pullman 1995In the trilogy wormholes are an immensely important plot device, one which is first discovered in the trilogy by protagonist Will Parry, when fleeing from his home after an accidental murder; he finds a window in the air in an Oxford street which leads to a totally different universe, the town of Cittagazze. In the rest of the trilogy, the other main characters use wormholes in the form of these extradimensional windows in order to travel "between worlds" and thus speed their journeys. [14] [ better source needed ] [15]
Einstein's Bridge John G. Cramer 1997The novel features travel via wormholes between alternate universes. [16]
Diaspora Greg Egan 1997The novel features scientifically well founded depictions of wormholes.
Timeline Michael Crichton 1999In the novel traversable wormholes are used for time travel along with the theory of quantum foam.
The Light of Other Days Arthur C. Clarke and Stephen Baxter 2000The novel discusses the problems which arise when a wormhole is used for faster-than-light communication. In the novel the authors suggest that wormholes can join points distant either in time or in space and postulate a world completely devoid of privacy as wormholes are increasingly used to spy on anyone at any time in the world's history.
Commonwealth Saga Peter F. Hamilton 2002The series describes how wormhole technology could be used to explore, colonize and connect to other worlds without having to resort to traditional travel via starships. This technology is the basis of the formation of the titular Intersolar Commonwealth, and is used so extensively that it is possible to ride trains between the planets of the Commonwealth.
The Algebraist Iain M. Banks 2004In the novel traversable wormholes can be artificially created and are a central factor/resource in the stratification of space-faring civilizations.
The Power of Five series Anthony Horowitz 2005In the series wormholes are an important plot device: the Gatekeepers can travel anywhere they wish in the world instantly by using wormholes in the form of doors found in holy places such as churches, and the wormholes are also used as an important plot device in Book Two of the series, Evil Star, this time for a much more sinister purpose; the Old Ones, the antagonists, use the Nazca Lines as a gigantic wormhole to unlock the Lines in order to escape onto the Earth.
House of Suns Alastair Reynolds 2008The novel features a wormhole to Andromeda. One main character also alludes to other wormhole mouths leading to galaxies in the Local Group and beyond. In the books, all wormhole-linked galaxies are cloaked by Absences, which prevent information escaping the galaxy and thus protecting causality from being violated by FTL travel.
Palimpsest Charles Stross 2009An original story in the 2009 collection Wireless: The Essential Charles Stross  – which won the 2010 Hugo Award for Best Novella [17]  – the protagonist creates and uses temporary wormholes to travel through both space and time.
"Bright Moment" Daniel Marcus 2011The short story includes a wormhole for interstellar travel, which can be collapsed to what the story calls a singularity by a multi Gigaton thermonuclear explosion. The story first appeared in F&SF, and was later narrated on the Escape Pod podcast, episode 421. [18]
Waste of SpaceGina Damico2017This young-adult novel involves a secretive group of scientists dubbed NASAW (revealed at the end of the book to stand for the 'National Association for the Search of Atmospheric Wormholes') whose experiments create a wormhole that a protagonist travels through. [19] [better source needed]

In music

Wormholes in music
Universal Migrator Part 2: Flight of the Migrator On Ayreon's album, Universal Migrator Part 2: Flight of the Migrator , a soul is sucked into a black hole in the song "Into the Black Hole", goes through a wormhole in the song "Through the Wormhole", and leaves from a white hole in the song "Out of the White Hole".[ citation needed ]
Crack the Skye Mastodon's concept album Crack the Skye deals with a paraplegic child sucked into a wormhole. [20] [21]

In games

Wormholes in electronic games
Portal and Portal 2 The games Portal and Portal 2 are centered around the "Aperture Science Handheld Portal Device", also known as the "Portal Gun", a gun-shaped device that can create a temporary wormhole between two surfaces. [22] [23]
Space Rogue The science fiction computer game Space Rogue featured the use of technologically harnessed wormholes called "Malir gates" as mechanisms for interstellar travel. Navigation through the space within wormholes was a part of gameplay and had its own perils.[ citation needed ]
Freelancer Wormholes are also seen in the computer game Freelancer , commonly referred as "jump holes". They are supposed to be black hole-like formations with ultra-high gravity amounts, that work like 'portals' for players to travel instantly between different star systems. The game also features "jump gates", which are described as devices capable of generating an artificial jump hole.[ citation needed ]
Darkspace In the Massively Multiplayer Online Game Darkspace , a player-versus-player starship combat game, players can create short-term stable wormholes to traverse the game's universe instantly, rather than use the game's concept of FTL travel to move from point A to point B. Wormhole Generation Devices are only available on ships with higher rank requirements, usually Vice Admiral or above, and are most common on Space Stations.[ citation needed ]
Orion's Arm In the on-line fictional collaborative world-building project "Orion's Arm", wormholes are used for communication and transport between the millions of colonies in the local part of the Milky way Galaxy. In an attempt to make the physics of the wormhole travel at least semi-plausible, large amounts of ANEC-violating exotic energy are required to maintain the holes, which are nevertheless large objects which must be maintained on the outermost reaches of the planetary systems concerned.[ citation needed ]
X computer game series In the X computer game series by Egosoft, wormholes were established using Jump Gates, created by the Old Ones. These Jump Gates connected to many systems but not the Solar System. Humanity advanced to the technological level to create Jump Gate technology and discovered the already established gate network. Hundreds of years after cutting themselves off from the network to escape the Xenon, they created a Jumpdrive, allowing for travel between systems not connected directly via a gate. Different versions of Jumpdrives emerged with some being limited but stable, others being dangerously random.[ citation needed ]
Metroid Prime 3: Corruption In Metroid Prime 3: Corruption , Phazon-based organic meteors called Leviathans create wormholes to travel from Phaaze (the living planet they are "born" in) to other planets. They do this to "corrupt" the planet and any beings able to survive the Phazon into Phazon-based creatures. The planet would then progress into changing its environment until it becomes another planet like Phaaze. The Galactic Federation took control of one with Samus Aran's assistance, and used it to travel to and destroy Phaaze.[ citation needed ]
Far Gate Wormholes are used frequently in Far Gate as a means of transporting spacecraft across interstellar distances.[ citation needed ]
Star Trek: Shattered Universe In Star Trek: Shattered Universe , while in the Mirror Universe, the USS Excelsior (NCC-2000) encounters a wormhole similar to the one the USS Enterprise NCC-1701 in Star Trek: The Motion Picture the player must defend Excelsior from on coming asteroids and pursuing Starships of the Terran Empire, the evil Mirror Universe counterpart of the United Federation of Planets, until the ship can exit the wormhole.[ citation needed ]
Crysis 3 In Crysis 3 , the Alpha Ceph combines its energy with the energy of a C.E.L.L. orbital strike to create an Einstein–Rosen Bridge, thus allowing a Stage Three Ceph Invasion Force to be rapidly transported from Messier 33 to Earth in a matter of minutes.[ citation needed ]
LittleBigPlanet Karting LittleBigPlanet Karting features an "angry ripple in the very ether of LittleBigPlanet" called the Funkhole. It leads to the Garage at the End of the Universe, and destroys the Space Bass at the end of the sixth world.[ citation needed ]
Stellaris The science-fiction strategy game Stellaris features wormholes spread throughout the galaxy. The player may research technology to stabilize wormholes and travel through them to reach a linked wormhole elsewhere in the galaxy.[ citation needed ]

In television and film fiction

The Triangle The 2005 three-part US-British-German science fiction miniseries The Triangle uses a wormhole to explain mysterious disappearances in the Bermuda Triangle.[ citation needed ]
Invader Zim There is an episode of Invader Zim wherein Zim, in order to get rid of Dib and his horrible classmates once and for all, utilizes a wormhole to send Dib and the other Skoolkids on a one-way busride to an alternate dimension containing a room with a moose. However, Dib discovers Zim's plan, and taking advantage of a fork in the wormhole, is able to transport the bus back to Earth.[ citation needed ]
Event Horizon In the movie Event Horizon, the titular ship is designed to create an artificial wormhole. However, the wormhole doesn't lead to anywhere in the known universe, but to an alternate, horrific reality.[ citation needed ]
Fringe In the television series Fringe , the main storyline is the investigation of an unusual series of events and scientific experiments called the Pattern. In the second-season episode "Peter" it's revealed that the root cause of the Pattern was an incident in 1985 where Dr. Walter Bishop opened a wormhole into an alternate universe so that he may cure the alternate version of his terminally ill son, Peter (who had died in our universe). By crossing the wormhole, Dr. Bishop disrupted the fundamental laws of nature and weakened the fabric of space-time, causing incalculable destruction in the alternate universe and forcing them to seek a way to repair the damage caused and save their existence.[ citation needed ]
Power Rangers Time Force In Power Rangers Time Force , artificial Temporal Wormholes were used extensively for the delivery of the Time Fliers to travel to the past to aid the Rangers and was also used by Wes, Eric and Commandocon to travel to prehistoric times to recover the Quantasaurus Rex. In Power Rangers SPD , in the episode Wormhole, Gruumm and later the SPD Rangers used a "Temporal Wormole" to travel from 2025 to 2004 to battle with the Dino Thunder Rangers in early 21st century Reefside.[ citation needed ]
Vanishing Act The 21st episode Vanishing Act of the second season of the 1995 Canadian science fiction TV series The Outer Limits tells the story of a man who is abducted by an alien race through wormholes and later returned to his family every ten years.[ citation needed ]
Sliders In the FOX/Sci-Fi series Sliders , a method is found to create a wormhole that allows travel not between distant points but between different parallel universes; objects or people that travel through the wormhole begin and end in the same location geographically (e.g. if one leaves San Francisco, one will arrive in an alternate San Francisco) and chronologically (if it is 1999 at the origin point, so it is at the destination, at least by the currently accepted calendar on our Earth.) Early in the series, the wormhole is referred to by the name "Einstein–Rosen–Podolsky bridge," apparently a merging of the concepts of an Einstein–Rosen bridge and the Einstein–Podolsky–Rosen paradox, a thought-experiment in quantum mechanics. This series presumes that we exist as part of a multiverse and asks what might have resulted had major or minor events in history occurred differently; the wormholes in the series allow access to the alternate universes in which the series is set. The same premise is used in the Star Trek: The Next Generation episode "Parallels" and the Star Trek: The Original Series episode "The Alternative Factor" which premiered in 1967.[ citation needed ]
Déjà Vu The 2006 film Déjà Vu is based on a phenomenon caused by a wormhole, specifically referred to as an Einstein–Rosen Bridge.[ citation needed ]
The Lost Room The Lost Room is a science fiction television miniseries that aired on the Sci Fi Channel in the United States. The main character is allowed to travel around the planet when using a special key together with any kind of door, leading him to random locations. The key is part of a series of different artifacts, coming from an alternate reality.[ citation needed ]
Bill & Ted's Excellent Adventure Bill & Ted's Excellent Adventure is a 1989 American science fiction–comedy buddy film and the first film in the Bill & Ted franchise in which two metalhead slackers travel through a temporal wormhole in order to assemble a menagerie of historical figures for their high school history presentation.[ citation needed ]
Primeval: New World In the Primeval spin-off series Primeval: New World , Lt. Kenneth Leeds theorizes that the anomalies, the central plot point of the series which allow dinosaurs and other prehistoric creatures into the present day, are Einstein–Rosen Bridges after discovering the Spaghetti Junction in the Season 1 finale. However, this seems unlikely since they do not exist within black holes and do not allow travel across distances beyond the Earth yet, only through time.[ citation needed ]
Rick and Morty In the animated show, the main protagonist Rick Sanchez uses what's referred to as a 'portal gun' as a plot device to travel to different universes, dimensions and realities.[ citation needed ]
Voltron: Legendary Defender In the animated show, the main way of travel in space are Wormholes , created by the power of Altean Magic. The show's protagonist use wormholes to escape dangerous situation or to fly away from a fight.[ citation needed ]
Interstellar In the 2014 film Interstellar , scientists at NASA discover a wormhole orbiting the planet of Saturn, and send a team to travel through it to a distant galaxy in order to find a new home for the human race before Earth is unfit for life. The wormhole takes them halfway across the observable universe to another star system, containing a huge black hole named Gargantua. This new system has three candidate planets for re-seeding the human race, two of which orbit the black hole. In the movie, the wormhole is implied to have been placed there by future humans for the present humans to find a new home. The wormhole is described as the surface of a ball.[ citation needed ]
The Flash In the CW Network Superhero sci-fi, wormholes play a vital role in the series.[ citation needed ]
Strange Days at Blake Holsey High The television program features a wormhole that can lead to either the future or the past.[ citation needed ]

See also


  1. "What is a Wormhole?". Space.com. Retrieved 2018-09-08.
  2. Siegfried, Tom (2016-08-19). "A new 'Einstein' equation suggests wormholes hold key to quantum gravity". Science News. Retrieved 2018-09-08.
  3. Einstein, A.; Rosen, N. (1935-07-01). "The Particle Problem in the General Theory of Relativity". Physical Review. 48 (1): 73–77. doi:10.1103/physrev.48.73. ISSN   0031-899X.
  4. "Entanglement and the Geometry of Spacetime". Institute for Advanced Study. Retrieved 2018-09-08.
  5. "The Price". Star Trek: The Next Generation .
  6. "What is a Wormhole?". Space.com. Retrieved 10 September 2018.
  7. Lindley, David (25 March 2005). "Focus: The Birth of Wormholes". Physics. Retrieved 10 September 2018.
  8. Williamson, Jack. "Astounding Stories, March, 1931 by Various" . Retrieved 10 September 2018 via Project Gutenberg. It's hard to explain without mathematical language. You might say that we are looking through a hole in space. The new force in the meteorite, amplified by the X-rays and the magnetic field, is causing a distortion of space-time coordinates. You know that a gravitational field bends light; the light of a star is deflected in passing the sun. The field of this meteorite bends light through space-time, through the four-dimensional continuum. That scrap of ocean we can see may be on the other side of the earth.
  9. Dirda, Michael (February 27, 2018). "Perspective | 'A Wrinkle in Time': Let's hope the movie is better than the book". Washington Post. Retrieved 10 September 2018. Once Charles Wallace, Meg and their friend Calvin O’Keefe are transported to other planets by using tesseracts — wrinkles in the space-time continuum — the novel starts to go off in several directions at once.
  10. "BOOK REVIEW: The Forever War by Joe Haldeman". SF Signal. 13 July 2012. Retrieved 10 September 2018.
  11. "Black Holes and Einstein Rosen Bridges". www.st-v-sw.net. Retrieved 10 September 2018.
  12. "'Interstellar' Science: Is Wormhole Travel Possible?". Space.com. Retrieved 10 September 2018.
  13. Cowie, Jonathan. "Review of Xeelee Vengeance by Stephen Baxter". www.concatenation.org. Retrieved 10 September 2018.
  14. Gresh, Lois H. (2007-10-30). Exploring Philip Pullman's His Dark Materials: An Unauthorized Adventure Through The Golden Compass, The Subtle Knife, and The Amber Spyglass. New York: St. Martin's Press / Macmillan. p. 201. ISBN   9780312347437. Wormhole. Multiply connected spaces, passages between universes. It's unknown at this time whether mass can travel through a wormhole without being destabilized or destroyed.CS1 maint: Date and year (link)
  15. Cousin, Geraldine (2013-07-19). Playing for time: Stories of lost children, ghosts and the endangered present in contemporary theatre. Manchester University Press. p. 146. ISBN   9781847795489 via Google Books. The windows in His Dark Materials are the equivalent of wormholes, and Lyra and Will use them to journey between parallel worlds.
  16. Nahin, Paul J. (2016-12-24). Time Machine Tales: The Science Fiction Adventures and Philosophical Puzzles of Time Travel. Springer. p. 84. ISBN   9783319488646 via Google Books. The general theory of relativity predicts the existence of wormholes in spacetime and, in fact, they were first 'discovered' theoretically in the mathematics of relativity as early as 1916 by the Viennese physicist Ludwig Flamm (1885-1964). Later analyses were done by Einstein, himself. Wormholes have been discussed as a possible model for pulsars (as opposed to the more usual model as rotating neutron stars). It has also been suggested that the interior of a charged black hole may be the entrance to a wormhole. All of these various solutions to the gravitational field equations are generically called 'Einstein-Rosen bridges' in the physics literature (see note 81 for example), and the term soon appeard in fiction, too. [Note 83: See, for example, J. G. Cramer, Einstein's Bridge, Avon 1977]
  17. 2010 Hugo Award Winners at TheHugoAwards.org, published September 5, 2010, retrieved May 29, 2011
  18. "Escape Pod, Ep. 421". escapepod.org (Podcast). Escape Artists. 10 November 2013.
  19. WASTE OF SPACE by Gina Damico | Kirkus Reviews.
  20. Cohen, Johathan. "Update: Mastodon To Play Complete 'Skye' On North American Tour". Billboard. Retrieved 2018-09-10. It's about a crippled young man who experiments with astral travel. He goes up into outer space, goes too close to the sun, gets his golden umbilical cord burned off, flies into a wormhole, is thrust into the spirit real, has conversations with spirits about the fact that he's not really dead, and they decide to help him.
  21. McPadden, Mike (2012-05-01). If You Like Metallica...: Here Are Over 200 Bands, CDs, Movies, and Other Oddities That You Will Love. Backbeat Books. ISBN   9781476813578. Two thousand nine's Crack the Skye concerns the time-space wormhole travels of an astral-projecting paraplegic who enters Rasputin's body to battle the devil.
  22. "Life-size Portal gun to shoot onto shelves soon" . Retrieved 2018-09-09.
  23. "Portal Gun — Aperture Science Handheld Portal Device" . Retrieved 2018-09-09.