There have been many excellent sci-fi films released over the last 100 years, and movies like Metropolis and Back to the Future are at the top.

The 1970s were such a wild time for sci-fi movies like Star Wars and Alien that these films are often overlooked.

Hard science fiction refers to a subcategory of sci-fi that focuses on integrating scientific accuracy and real-world logic into its plot. Some of the greatest examples of hard sci-fi include films ...