science fiction, or science fiction studies, is the critical assessment, interpretation, and discussion of science fiction literature, film, TV shows, new media, fandom, and fan fiction. Science fiction scholars study science fiction to better understand it and its relationship to science, technology, politics, other genres, and culture-at-large. Science fiction studies began around the turn of the 20th century, but it was not until later that science fiction studies solidified as a discipline with the publication of the academic journals Extrapolation (1959), Foundation: The International Review of Science Fiction (1972), and Science Fiction Studies (1973), and the establishment of the oldest organizations devoted to the study of science fiction in 1970, the Science Fiction Research Association and the Science Fiction Foundation. The field has grown considerably since the 1970s with the establishment of more journals, organizations, and conferences, as well as science fiction degree-granting programs such as those offered by the University of Liverpool and the University of Kansas. Classification Science fiction has historically been sub-divided between hard science fiction and soft science fiction, with the division centering on the feasibility of the science central to the story. However, this distinction has come under increasing scrutiny in the 21st century. Some authors, such as Tade Thompson and Jeff VanderMeer, have pointed out that stories that focus explicitly on physics, astronomy, mathematics, and engineering tend to be considered "hard" science fiction, while stories that focus on botany, mycology, zoology, and the social sciences tend to be categorized as "soft," regardless of the relative rigor of the science. Max Gladstone defined "hard" science fiction as stories "where the math works," but pointed out that this ends up with stories that often seem "weirdly dated," as scientific paradigms shift over time. Michael Swanwick dismissed the traditional definition of "hard" SF altogether, instead saying that it was defined by characters striving to solve problems "in the right way–with determination, a touch of stoicism, and the consciousness that the universe is not on his or her side." Ursula K. Le Guin also criticized the more traditional view on the difference between "hard" and "soft" SF: "The 'hard' science fiction writers dismiss everything except, well, physics, astronomy, and maybe chemistry. Biology, sociology, anthropology—that's not science to them, that's soft stuff. They're not that interested in what human beings do, really. But I am. I draw on the social sciences a great deal." As serious literature Respected authors