There Are Thousands of Sci-Fi Movies — We'll Be Impressed If You Can Name 40!

"Close Encounters of the Third Kind" is one of the most screened movies in history thanks to a place called the Devils Tower KOA Campground. They screen "Close Encounters" every single night there as the featured movie.

Steven Spielberg's classic "E.T." is one of the rare movies of the genre which is fairly positive and depicts aliens as friendly. That almost didn't happen as early drafts of the script had a much more horror tone to them.

"Arrival" starred Amy Adams and proved to be a very popular film with a bit of a mind-bending story. The original title, taken from the story that inspired the movie, was "Story of Your Life," but test audiences hated the name, so it was changed.

"Star Wars: The Last Jedi" was part of the trilogy made by Disney after they bought the franchise from George Lucas. Lucas had already plotted parts 7 through 9, but Disney dropped nearly everything he had come up with aside from Luke living alone on an island.

In 2009, "Star Trek" was rebooted with a new cast playing the characters from the '60s TV show. It included a lot of nods to the original though and plenty of fun quirks most people never knew about. For instance, the sound of the doors opening on the Enterprise? That's the sound of a Russian toilet flushing.

"Galaxy Quest" has actually been voted one of the top "Star Trek" movies ever, even though it's not a real "Star Trek" movie. There's a scene in the movie when Tim Allen's character overhears how his cast mates hate him that was apparently based on a real incident in William Shatner's life.

Though not his first move, "Terminator" was arguably Arnold Schwarzenegger's biggest. This is kind of ironic given that he has barely over a dozen lines in the entire movie, a conscious decision to make him seem more robotic and distant.

"Gravity" was a critical and commercial success and also featured some amazing scenes. The opening shot of the movie is one 12-minute, unedited scene from start to finish that takes place in space.

"War for the Planet of the Apes" featured performances by both Andy Serkis as Caesar and Terry Notary as Rocket. Both actors have also played King Kong in different films as well, meaning they've clearly mastered ape acting.

Pixar's "Wall-E" proved to be one of their most critically acclaimed films ever. It netted six Academy Award nominations, which tied it with 1991's "Beauty and the Beast" for most nominations for an animated film.

It took James Cameron four years to make the movie "Avatar." Historically he has been known as a very aggressive, borderline abusive director to work with. Word is he had a nail gun on the set of "Avatar" that he'd use on cellphones if one rang during filming.

Tom Cruise starred in "Minority Report." Both Cruise and director Steven Spielberg waved their salaries to make this movie, opting instead to take 15% of the gross in lieu of their usual payday.

"Men in Black" is actually based on a comic book, though it was never really advertised as being a comic book movie. Word is neither Will Smith nor Tommy Lee Jones wanted to star in the movie at first, and both had to be convinced.

Part of the appeal of "Inception" is that the movie takes you through layers of dreams so you often don't know what's happening. That was all ignored on TV broadcasts of the movie in Japan where on-screen text told viewers what part of the dream they were in.

Tom Hardy and Charlize Theron starred in "Mad Max: Fury Road." In order to give Theron's character a fake arm, the actress wore a green cast that could be digitally edited out. Unfortunately, that same cast was so tough it broke Hardy's nose when she elbowed him by accident.

"Aliens" is one of the few sequels widely recognized as being more popular than the original. Lance Henriksen, who played Bishop in the movie, was planning on quitting acting if this role didn't work out because he was tired of small parts that went nowhere.

Everyone remembers the time-travelling DeLorean from "Back to the Future" but it almost wasn't even part of the film. In fact, in the original script, the time machine was supposed to be a refrigerator and not a car at all.

Matt Damon gets stranded on Mars in "The Martian." Damon shot his scenes alone for over a month straight. As a result, he didn't meet or spend any time with the rest of the cast until it was time to promote the film.

Word is that the original 1956 "Invasion of the Body Snatchers" contained quite a bit of humor, but audiences during test screenings didn't quite get it, and horror/comedy was not a genre yet, so much of it was edited out.

Emily Blunt plays Rita Vrataski in "Edge of Tomorrow." In the movie, she's able to reset a single day and become a kind of warrior hero. She uses a blade to fight in the movie because her character would have kept running out of ammo, so the sword made more sense.

"Snowpiercer" features Chris Evans and Tilda Swinton in a truly bizarre story of a train that never stops running. Tilda Swinton's role was originally written for actor John C. Reilly and some of the lines still refer to the character in the masculine.

Scarlett Johansson plays the voice of the AI in "Her" but she wasn't the first choice. Samantha Morton originally voiced the role but the director, when editing the movie, felt they needed something different and had Johannson record the part.

"Forbidden Planet" is a classic of the genre, and Gene Roddenberry said the film was a major inspiration for "Star Trek." It was one of the first sci-fi films to be given a substantial budget as studios didn't usually care for the genre.

Gosling joined Harrison Ford in "Blade Runner 2049" alongside actor Jared Leto. Director Denis Villeneuve wanted David Bowie to play the role that Leto played, but Bowie died before filming began.

"The Day The Earth Stood Still" was honored by George Lucas when he named three of Jabba's minions "Klaatu," "Barada" and "Nikto" after a line in the film. The same words also appear in "Army of Darkness" as a magic phrase.

"Jurassic Park" is pretty much legendary at this point, and they're still making sequels. During filming, the rain messed up the electronics of the T. Rex, and it would sometimes start moving on its own.

Actor Joseph Gordon-Levitt played a young Bruce Willis in "Looper" and was acclaimed for his uncanny performance. He achieved his eerily similar look and mannerisms through a combination of prosthetics and careful studying of many of Willis' past performances.

There's a popular legend that the name Godzilla was an Americanized version of the word Gojira, but it was the Japanese production company, Toho, that first called the movie Godzilla since that is how it's pronounced in Japanese and how they wanted to advertise it in English.

Stanley Kubrick's "2001: A Space Odyssey" is considered a classic of the genre even though people didn't much care for it when it premiered. On the first night, hundreds of people walked out of the theater because they didn't like the movie.

Keanu Reeves really proved his action movie chops in 1999's "The Matrix." The habit he still has today of doing his own insane stunts began in this movie - like when Reeves stood out on a 34th story windowsill to talk on the phone.

"Children of Men" is based on a novel by author P.D. James. In a weird twist, the movie tweaked the story from the book to make women the reason humans can't reproduce. In the novel, however, the fertility issue is with men.

Sharlto Copley, the star of "District 9," had never acted before he made this movie and has since gone on to a fairly high-profile career. He has been in several movies from the same director, Neil Blomkamp.

Oscar Isaac was filming "Star Wars: The Last Jedi" at the same time as "Annihilation" on adjacent lots. He was using the same trailer for both movies and apparently would sometimes film scenes from both movies on the same day.

"The World's End" is the third part of the unofficial Cornetto Trilogy that was directed by Edgar Wright and starred Simon Pegg and Nick Frost. The first two movies were "Shaun of the Dead" and "Hot Fuzz."

David Cronenberg's "The Fly" was a remake of a Vincent Price movie. Cronenberg's movie contained an infamous scene in which a monkey and a cat are fused in the telepod and Brundle has to beat it to death. They cut it after audiences felt it destroyed the character's humanity.

"Attack the Block" was the first movie of future "Star Wars" star John Boyega. He got the role after reading an ad online looking for actors. The director auditioned 1,500 actors for the various teen roles.

"Robocop" was part action movie and part biting satire. The extremely convincing robotic walk actor Peter Weller came up with for the character was a mix of his good acting and necessity. The costume was so rigid, he could barely move in it.

"Metropolis" is often considered the first sci-fi film ever made. It has been so influential, not just to the genre but to the medium, that even the Vatican has selected it as an official work of art. It clearly influenced numerous later works, from "Superman" to "Star Wars."

Robert De Niro was uncredited in the movie "Brazil," at first because he was under contract elsewhere and was not supposed to be making other films. He also didn't take a paycheck for the movie because he wanted to be in it so badly.