While science fiction and magical realism both bend the notion of what is real, toy with human imagination, and are forms of (often fantastical) fiction, they differ greatly. Bower's cites Aldous Huxley's Brave New World as a novel that exemplifies the science fiction novel's requirement of a "rational, physical explanation for any unusual occurrences". Huxley portrays a world where the population is highly controlled with mood enhancing drugs, which are controlled by the government. In this world, there is no link between copulation and reproduction. Humans are produced in giant test tubes, where chemical alterations during gestation determine their fates. Bowers argues that, "The science fiction narrative's distinct difference from magical realism is that it is set in a world different from any known reality and its realism resides in the fact that we can recognize it as a possibility for our future. Unlike magical realism, it does not have a realistic setting that is recognizable in relation to any past or present reality."[57]