Gangers
This is a list of fictional creatures and Extraterrestrial life, aliens from the Fictional universe, universe of the List of longest-running British television programmes, long-running BBC science fiction on television, science fiction television series ''Doctor Who'', and Doctor Who spin-offs, spin-offs:''Torchwood'', ''The Sarah Jane Adventures'', ''Class (2016 TV series), Class'', ''K-9 (TV series), K-9'' and ''K-9 and Company''. Note that this list only covers alien races and other fictional creatures and not specific characters, for individual characters see the lists in the separate articles below: * List of Doctor Who villains, List of ''Doctor Who'' villains * List of Doctor Who henchmen, List of ''Doctor Who'' henchmen * List of Doctor Who robots, List of ''Doctor Who'' robots 0–9 The 456 The 456 served as the main antagonists during Children of Earth, the third series of ''Torchwood''. They are unnamed aliens with whom the government of the United Kingdom made a ...
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Extraterrestrial Life
Extraterrestrial life, colloquially referred to as alien life, is life that may occur outside Earth and which did not originate on Earth. No extraterrestrial life has yet been conclusively detected, although efforts are underway. Such life might range from simple forms like prokaryotes to intelligent beings, possibly bringing forth civilizations that might be far more advanced than humankind. The Drake equation speculates about the existence of sapient life elsewhere in the universe. The science of extraterrestrial life is known as astrobiology. Speculation about the possibility of inhabited "worlds" outside the planet Earth dates back to antiquity. Multiple early Christian writers discussed the idea of a "plurality of worlds" as proposed by earlier thinkers such as Democritus; Augustine references Epicurus's idea of innumerable worlds "throughout the boundless immensity of space" (originally expressed in his Letter to Herodotus) in ''The City of God''. In his first century p ...
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