Science fiction is a film genre that uses speculative, fictional science-based depictions of phenomena that are not fully accepted by mainstream science, such as extraterrestrial lifeforms, spacecraft, robots, cyborgs, mutants, interstellar travel, time travel, or other technologies. Science fiction films have often been used to focus on political or social issues, and to explore philosophical issues like the human condition.
Metropolis (1927) by Fritz Lang was one of the first feature length science fiction films. It was produced at Studio Babelsberg, Germany. (Photo shows the statue depicting the Machinenmensch before it is given Maria's soul, at Filmpark Babelsberg).
Transformers characters at Universal Studios Hollywood
A film genre is a stylistic or thematic category for motion pictures based on similarities either in the narrative elements, aesthetic approach, or the emotional response to the film.
Western films are those "set in the American West that embod[y] the spirit, the struggle and the demise of the new frontier". Pictured: Clint Eastwood in the Spaghetti Western film A Fistful of Dollars (1964).
War film or anti-war movie: Lewis Milestone's All Quiet on the Western Front, 1930
![Western films are those "set in the American West that embod[y] the spirit, the struggle and the demise of the new frontier". Pictured: Clint Eastwood](https://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/Clint_Eastwood_-_1960s.JPG/640px-Clint_Eastwood_-_1960s.JPG)
