Science Fiction, Fantasy, and Horror as ways of comprehending life extend back to mythology. Science Fiction as literature emerged between the 13th and 17th centuries. With the invention of the novel as literature in the 18th Century, more works appeared and, in the 19th Century, Mary Shelley's Frankenstein defined Science Fiction as a genre separate from Fantasy. Edgar Allan Poe wrote a story about a flight to the moon. Concurrent with turn of the century new technology, writers Jules Verne, H. G. Wells, and a bit later, Edgar Rice Burroughs, created an abundance of speculation and Fantasy. Fantasy is an element of many of the greatest works of literature, beginning with early documents such as the Epic of Gilgamesh. Horror is rooted in the earliest recorded tales, and recent folklore also contains horrific situations and archetypes. The Gothic novels appearing in the late 18th Century spread in popularity, and by the 19th Century, the beginnings of Modern Horror developed. There is a great deal of overlapping between the Science Fiction, Fantasy, and Horror genres.