Science fiction is a genre of fiction. It differs from fantasy in that, within the context of the story, its imaginary elements are largely possible within scientifically established or scientifically postulated laws of nature (though some elements in a story might still be pure imaginative speculation). Exploring the consequences of such differences is the traditional purpose of science fiction, making it a "literature of ideas". Science fiction is largely based on writing rationally about alternative possibilities. The settings for science fiction are often contrary to known reality.
The study of science fiction, or science fiction studies, is the critical assessment, interpretation, and discussion of science fiction literature, film, new media, fandom, and fan fiction. Science fiction scholars take science fiction as an object of study in order to better understand it and its relationship to science, technology, politics, and culture-at-large.
The field has grown considerably since the 1970s with the establishment of more journals, organizations, and conferences with ties to the science fiction scholarship community, and science fiction degree-granting programs such as those offered by the University of Liverpool and Kansas University.
The character also appeared in films, on the radio and in print over a fifty-year period. Kneale picked the character's unusual surname from a London telephone directory, while the first name was in honour of the astronomer Bernard Lovell. Quatermass is an intelligent and highly moral British scientist, who continually finds himself confronting sinister alien forces that threaten to destroy humanity. In the initial three serials he is a pioneer of the British space programme, heading up the British Experimental Rocket Group.
The character of Quatermass has been described by BBC News Online as Britain's first television hero, and by The Independent newspaper as "A brilliantly conceived and finely crafted creation... [He] remained a modern 'Mr Standfast', the one fixed point in an increasingly dreadful and ever-shifting universe." In 2005, an article in The Daily Telegraph suggested that "You can see a line running through him and many other British heroes. He shares elements with both Sherlock Holmes and Ellen MacArthur."