As long as there has been science, science fiction has existed. The secrets of the universe remain a mystery to us, but that doesn�t stop us from making guesses. An author who writes a science fiction novel tries to base it around the technology and knowledge that we have available to us. Those tidbits of knowledge are then exaggerated to great lengths, and then set into the future, on other planets, in other dimensions in time, or under new variants of scientific law. This process is called extrapolation, and becomes the premise of the story. This webpage works in reverse, by taking the scientific aspects from classic works of science fiction and explaining how they relate to Astrobiology.