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Welcome to the Encyclopedia of Science Fiction, Fourth Edition. Some sample entries appear below. Click here for the Introduction; here for the masthead; here for Acknowledgments; here for the FAQ; here for advice on citations. Find entries via the search box above (more details here) or browse the menu categories in the grey bar at the top of this page.

Site updated on 23 May 2022
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We perceive three spatial dimensions, but theoretical Mathematics is easily capable of dealing with many more. Conventional graphical analysis frequently represents Time as a dimension, encouraging consideration of it as the "fourth dimension". The possible existence of Parallel Worlds displaced from ours along a fourth spatial dimension (in the same way that a series of two-dimensional universes might lie next to one another like the pages of a book) is a popular hypothesis in sf, and such ...


A clone is a group of individuals comprising the asexually produced offspring of a single individual. A pair of identical twins is a clone because the twin cells are produced by the asexual fission of the fertilized ovum. Asexual reproduction is very common among protozoa and some groups of invertebrates, but is much rarer in vertebrates. The possibility of cloning humans by transplanting the nucleus of a somatic cell from a donor into an ovum which can then be replaced in a host womb has ...

Bolland, Brian

(1951-    ) UK Comic-book artist highly regarded for his smooth line and meticulous, sculptural drawing style. His first strip work appeared in the underground magazine Oz in 1971. In 1975-1977 he drew Powerman, a Black Superhero, for the Nigerian market, his episodes alternating with those by Dave Gibbons, and then he began producing covers for 2000 AD. His most lasting contribution to date has been his development of Judge Dredd: Bolland's first Judge Dredd strip appeared ...

Green, Simon R

(1955-    ) UK author, mostly of Fantasies [not listed below; for titles to 1996 see The Encyclopedia of Fantasy under links below]. He is perhaps best known in that genre for the substantial Hawk and Fisher police-procedural Sword and Sorcery sequence beginning with Hawk & Fisher (1990); in the horror genre, he is most prominent for the equally substantial Steampunk Alternate World Nightside sequence set in London and beginning with Something from the Nightside (2003). ...

Pollack, Frederick

(1945-    ) US university teacher and poet, best known in the latter capacity for his two book-length narrative poems (see Poetry): The Adventure (1986) is an Afterlife fantasy [see The Encyclopedia of Fantasy under links below]; Happiness (1998) is set in an Alternate World, created (perhaps advertently) by Stephen Hawking (1942-2018), where the lines of power have been reversed, and a leftwing Utopia has been created. It does not last. [JC]

Langford, David

(1953-    ) UK author, critic, editor, publisher and sf fan, in the latter capacity recipient of 21 Hugo awards for fan writing – some of the best of his several hundred pieces are assembled as Let's Hear It for the Deaf Man (coll 1992 chap US; much exp vt The Silence of the Langford 1996; exp 2015 ebook) as Dave Langford, edited by Ben Yalow – plus five Best Fanzine Hugos and one Semiprozine Hugo for his self-produced news magazine, Ansible (which see). His one ...

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