You are using an older browser version. Please use a supported version for the best MSN experience.

50 Best Sci-Fi Movies of All Time

24/7 Wall St. Logo By Steven M. Peters of 24/7 Wall St. | Slide 1 of 51: <p>Science fiction is loosely defined as any speculative fiction, including genres such as alternative history, fantasy, and horror, although there are several enduring themes that persist in the most popular sci-fi films.</p><p>Alien contact, space exploration, time travel, artificial intelligence, and imaginations of future technologies and societies are some of the most common themes among the 50 best science fiction movies of all time.</p><p>To determine the 50 best sci-fi movies of all time, 24/7 Wall St. created an index based on user ratings from IMDb and Rotten Tomatoes. The films range from 1931 to this year.</p>

Science fiction is loosely defined as any speculative fiction, including genres such as alternative history, fantasy, and horror, although there are several enduring themes that persist in the most popular sci-fi films.

Alien contact, space exploration, time travel, artificial intelligence, and imaginations of future technologies and societies are some of the most common themes among the 50 best science fiction movies of all time.

To determine the 50 best sci-fi movies of all time, 24/7 Wall St. created an index based on user ratings from IMDb and Rotten Tomatoes. The films range from 1931 to this year.

© Courtesy of TriStar Pictures

More From 24/7 Wall St.

image beaconimage beaconimage beacon