The Motion of Light in Water

Non-fiction is the form of any narrative, account, or other communicative work whose assertions and descriptions are understood to be factual. This... presentation may be accurate or not—that is, it can give either a true or a false account of the subject in question—however, it is generally assumed that authors of such accounts believe them to be truthful at the time of their composition or, at least, pose them to their audience as historically or empirically true. Note that reporting the beliefs of others in a non-fiction format is not necessarily an endorsement of the ultimate veracity of those beliefs, it is simply saying it is true that people believe them . Non-fiction can also be written about fiction, giving information about these other works. Non-fiction is one of the two main divisions in writing, particularly used in libraries, the other form being fiction. However, non-fiction need not be written text necessarily, since pictures and film can also purport to present a factual account of a subject.
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Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and... technology, space travel, aliens, and paranormal abilities. Exploring the consequences of scientific innovations is one purpose of science fiction, making it a "literature of ideas". Science fiction is largely based on writing rationally about alternative possible worlds or futures. It is similar to, but 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 . The settings for science fiction are often contrary to known reality, but most science fiction relies on a considerable degree of suspension of disbelief, which is facilitated in the reader's mind by potential scientific explanations or solutions to various fictional elements. Science fiction elements include: Science fiction is difficult to define, as it includes a wide range of subgenres and themes.
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A biography is a detailed description or account of someone's life. It entails more than basic facts , a biography also portrays a subject's... experience of these events. Unlike a profile or curriculum vitae , a biography presents a subject's life story, highlighting various aspects of his or her life, including intimate details of experience, and may include an analysis of a subject's personality. Biographical works are usually non-fiction, but fiction can also be used to portray a person's life. One in-depth form of biographical coverage is called legacy writing. Biographical works in diverse media—from literature to film—form the genre known as a biography. An authorized biography is written with the permission, cooperation, and, at times, participation of a subject or a subject's heirs. An autobiography is about a life of a subject, written by that subject or sometimes with a collaborator. The Early Middle Ages saw a decline in awareness of the classical culture in Europe. During this time, the only repositories of knowledge and records of the early history in Europe were those of the Roman Catholic Church.
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