According to Arthur C. Clarke, Stanley Kubrick wanted to get an insurance policy from Lloyds of London to protect himself against losses in the event that extraterrestrial intelligence were discovered before the movie was released. Lloyds refused. Carl Sagan commented, "In the mid-1960s, there was no search being performed for extraterrestrial intelligence, and the chances of accidentally stumbling on extraterrestrial intelligence in a few years' period was extremely small. Lloyds of London missed a good bet."

At the premiere screening, 241 people walked out of the theater, including Rock Hudson, who said, "Will someone tell me what the hell this is about?" Arthur C. Clarke once said, "If you understand '2001' completely, we failed. We wanted to raise far more questions than we answered." Clarke later expressed some concern that the film was too hard to follow, and explained things more fully in the novelization and subsequent sequels.

According to Douglas Trumbull, the total footage shot was some 200 times the final length of the film.

The movie was not a financial success at first. MGM was planning to pull it back from theaters, but several theater owners persuaded them to keep showing the film. Many owners noticed increasing numbers of young adults attending the film. They were especially enthusiastic about watching the "Star Gate" sequence under the influence of psychotropic drugs. This helped the film to become a financial success.

Stanley Kubrick calculated that it would take one person 13 years to hand draw and paint all the mattes needed to insert the assorted spacecraft into the starry backgrounds. Kubrick hired 12 other people, and did the job in one year.

Stanley Kubrick worked for several months with effects technicians to come up with a convincing effect for the floating pen in the shuttle sequence. After trying many different techniques, without success, Kubrick decided to simply use a pen that was adhered (using newly invented double-sided tape) to a sheet of glass and suspended in front of the camera. In fact, the shuttle attendant can be seen to "pull" the pen off the glass when she takes hold of it.

There is no dialogue in the first 25 minutes of the movie (ending when a stewardess speaks at 25:38), nor in the last 23 minutes (excluding end credits). With these two lengthy sections and other shorter ones, there are around 88 dialogue-free minutes in the movie.

The last movie made about men on the moon before Neil Armstrong and Buzz Aldrin walked there in real life. More than 50 years later there are still conspiracy theorists who insist that this is not a coincidence, claiming that all footage of Armstrong's voyage was a hoax film directed by Stanley Kubrick using leftover scenes and props from this movie.

The initial idea for the device that would eventually become the black monolith involved a transparent screen, which would show the australopithecines how to use objects as tools and weapons. Arthur C. Clarke later dismissed it as 'too naive'. Also, the H.A.L. 9000 computer started out as a mobile robot, but as Clarke feared that this view of artificial intelligence would become hopelessly out-dated in the coming decades, the omnipresent red eye was conceived.

According to Katharina Kubrick, Stanley Kubrick provided the breathing heard in the space-suits.

An early draft of the script had narration.

Frank Miller, who plays the mission control voice, was a member of the U.S. Air Force in reality, and a real mission controller. He was hired because his voice was the most authentic the producers could find for the role. Inexperienced and nervous, he could not keep from tapping his foot during recording sessions, and the tapping sound repeatedly came through on the audio tracks; Stanley Kubrick folded up a towel, put it under Miller's feet, and told him to tap to his heart's content.

Stanley Kubrick cut 19 minutes from the film's original 158-minute running time after its New York premiere, mostly to speed up the pacing.

The entire centrifuge section of the Discovery spacecraft was constructed as a single set. It was designed to rotate for shots such as the sequence in which Frank went jogging so that the actor remained on the bottom.

At the beginning, the prehistorical African landscapes are just photographs, not actual clips.

The only Oscar won by the film was for special visual effects. It was awarded to Stanley Kubrick--and was his sole win from 13 nominations. However, while Kubrick designed much of the look of the film and its effects, many of the technicians involved felt it was wrong for him to receive the sole credit. Following this controversy, the Academy tightened its eligibility rules.

The entire film contains only 205 special effects shots, compared to 350 in Star Wars: Episode IV - A New Hope (1977) and over 2,200 such shots in Star Wars: Episode III - Revenge of the Sith (2005).

The sun and the crescent moon aligned with each other (in the opening shot) is a symbol of Zoroastrianism, an ancient Persian religion that predates Buddhism and Christianity and is based on the teachings of the prophet Zoroaster (also known as Zarathustra). This particular alignment symbolizes the eternal struggle between light and darkness. Appropriately enough, the famous "2001: A Space Odyssey Theme" is from "Also Sprach Zarathustra" (Thus Spake Zarathustra), the symphonic poem by Richard Strauss, based on a book by Friedrich Nietzsche, which contained his famous declaration "God is dead". One can assume, given Stanley Kubrick's working methods, that none of this was accidental.

Stanley Kubrick had several tons of sand imported, washed and painted for the moon surface scenes.

After seeing the documentary To the Moon and Beyond (1964) at the 1964 New York World's Fair, Stanley Kubrick hired one of its special effects technicians, Douglas Trumbull, to work on this film. Trumbull developed a process called Slitscan photography to create the wild, kaleidoscopic images Bowman experiences going through the Stargate. It involved moving the camera rapidly past different pieces of lighted artwork, with the camera shutter held open to allow for a streaking effect. The overall effect gave the audience the sense of plunging into the infinite. Trumbull was later hired by ABC to produce the famous opening sequence for the ABC "Movie of the Week" using the same slitscan technique used for 2001.

Arthur C. Clarke first became aware of the project when the following cable from Roger Caras at MGM landed on his desk in 1963: "STANLEY KUBRICK DR STRANGELOVE PATHS OF GLORY ETC INTERESTED IN DOING FILM ON ETS STOP ARE YOU INTERESTED QUERY THOUGHT YOU WERE RECLUSE STOP" Clarke replied with the following cable: "FRIGHTFULLY INTERESTED IN WORKING WITH ENFANT TERRIBLE STOP CONTACT MY AGENT STOP WHAT MAKES KUBRICK THINK I'M A RECLUSE QUERY".

The English psychedelic rock band Pink Floyd were at one point approached to perform music for the film. However, they turned it down due to other commitments. Yet they retain a connection with the film: much like The Wizard of Oz (1939) and "Dark Side of the Moon", it is said that Pink Floyd's song "Echoes" from the album "Meddle" can be perfectly synchronized with the "Jupiter & Beyond the Infinite" segment of the film. See links section for details.

In honor of the book and movie, NASA named a Mars orbiter: 2001 Mars Odyssey. This was not the first time NASA had a connotation with the film; the Apollo 13 command module's callsign was Odyssey during the ill-fated mission.

Evidence of Stanley Kubrick's attention to detail: there are visible replacement instructions for the explosive bolts in the ejection apparatus of the pods.

The main Discovery set was built by aircraft manufacturer Vickers-Armstrong inside a 12m-x-2m drum designed to rotate at 5kph. It cost $750,000.

Originally, Stanley Kubrick had Stuart Freeborn create a primitive but more human-like make-up for the actors playing the australopithecines, but he couldn't find a way to photograph them in full length without getting an X-rating from the MPAA, since they had to be naked. So Kubrick went with a hairier model. With the exception of two baby chimpanzees, all were played by humans in costume. Freeborn and his wife Kay Freeborn used comic actor Ronnie Corbett as a make-up model, but he did not appear in the final film. Daniel Richter, who plays the australopithecine Moon-Watcher, choreographed most of these scenes. Early viewers of the movie wondered where Kubrick obtained such well-trained monkeys. It was later joked that "2001" lost the Best Makeup Academy Award to John Chambers for Planet of the Apes (1968) because the judges didn't realize the "2001" australopithecines were really humans, but there was no nomination list at all, as the award was not created until 1981--Chambers' award was merely honorary.

All of the special effects footage had to be printed on the original negatives. Stanley Kubrick thought using copies of the negatives would harm the visual quality of effects shots.

It is reported that Stanley Kubrick and Arthur C. Clarke watched an enormous number of science-fiction films in preparation for creating this movie and Kubrick himself acknowledged the influence of producer George Pal's films. Pal's Conquest of Space (1955) provided several plot points throughout the movie.

Poole (Gary Lockwood) was filmed wearing a helmet on the bridge of Discovery because Stanley Kubrick initially had doubts over the scientific possibility of a person's survival for even an instant in a vacuum; however, data published at the time indicated that such survival was indeed possible, which allowed the Emergency Air Lock re-entry sequence to be filmed and for scenes to be shot of the astronauts without their helmets.

Originally Stanley Kubrick wanted legendary manga creator Osamu Tezuka to do some of the art direction after watching Astroboy (1963). However Tezuka had to turn down the offer, due to transporting issues from Japan to the UK. After the film's release, Tezuka told Kubrick that he loved the movie and listens to the film's soundtrack while making his work.

In both the book and film, HAL's creator, Dr. Chandra, has what is almost certainly a deliberately chosen name. Chandra, as well as being a common Indian surname, is a name of the Hindu lunar deity, and the word for "moon" in Hindi. Dr. Chandra's full first name, Sivasubramanian, can be translated as "Dear priest of Shiva". Shiva, the name of a supreme Hindu deity, carries as one of its meanings "the one who admits no imperfection". Therefore Dr. Chandra, the creator of a computer believing itself incapable of mistakes, has a uniquely appropriate first name. Arthur C. Clarke, who spent much of his life in Sri Lanka (where Buddhism is a major religion and Hinduism is a minor religion), would almost certainly have known these meanings.

Stanley Kubrick previewed the film for critics, but quickly regretted doing so. Among the mostly indifferent and unfavorable reviews, as noted in the documentary 2001: The Making of a Myth (2001), were: "Somewhere between hypnotic and immensely boring"--The New York Times; "A monumentally unimaginative movie"--Harpers; "Space Odyssey fails most gloriously"--Newsday; and "Big, Beautiful but plodding scifi epic. Superb photography major asset to confusing, long-unfolding plot."--Variety.

Though almost invisible when watching the film on a TV screen, the four satellites in the first space sequence bear United States, German, French and Chinese markings.

Filming the special effects shots took 18 months at a cost of $6.5 million (the film's total budget was $10.5 million). Stanley Kubrick was determined to make every effects shot look extremely realistic, something previous science-fiction films rarely bothered to do.

Originally intended as a road-show release, with Overture, Intermission, and Exit music (all with curtain warmers) and a 35-millimetre black-and-white prologue of interview with experts on the possibilities of off-Earth biology. Despite the fact that the Overture, Intermission, and Exit Music were not used, the film still went out as a road-show release, and still had an intermission. When Stanley Kubrick learned this, he not only ordered where the intermission took place, but had his film's composer record specific music for the intermission, and requested that the theatre be plunged into darkness for a minute before the film restarted.

The silverware used at the station and in the Discovery was designed by renowned Danish architect Arne Jacobsen in 1957 and is still available for sale 50 years after first being produced.

Originally, HAL was to be called Athena and have a female voice. According to Keir Dullea (Dave Bowman), Nigel Davenport and Martin Balsam were hired and later replaced before Douglas Rain finally landed the role of HAL. Davenport was actually on-set in England during filming, reading HAL's lines off-camera so that Dullea and Gary Lockwood could react to them. Apparently, Stanley Kubrick thought that Davenport's English accent was too distracting, so after a few weeks he dismissed him and for the remainder of the shoot HAL's lines were read by an assistant director who, according to Dullea, had a Cockney accent so thick that lines like "Better take a stress pill, Dave" came out like "Better tyke a stress pill, Dyve". Later Balsam was hired and recorded HAL's voice in New York, but again when Kubrick heard his lines he wasn't satisfied, so he finally got Rain to re-record everything during post-production. Rain recorded in Canada, speaking his lines barefoot with his feet resting on a pillow to get the relaxed tone. For the sequel, Peter Hyams' 2010: The Year We Make Contact (1984), the opposite process was used: Rain recorded all of HAL's dialogue during pre-production prior to principal photography. That's why, to this day, Dullea and Rain have never actually spoken directly to each other or met in person.

According to Stanley Kubrick biographer John Baxter, Kubrick decided to use the Sinar Front Projection system for the desert backdrops during the Dawn of Man scenes. This method was selected because rear projection of the desert scenes would have proved too murky for Super Panavision. The use of the Sinar system explains why in the scene where the leopard is sitting next to the dead zebra (in reality a painted dead horse) the leopard's eyes glow a bright color. The Sinar system used glass transparencies as backdrops; however, the projectors necessary for this system were so hot that a draft or a breath could crack the glass. As a result, crew members were required to wear face masks, which started a long-persistent rumor that Kubrick had a paranoia of catching infections.

TMA-1 stands for Tycho Magnetic Anomaly-1. The monolith was originally to have been a black tetrahedron; however, it did not reflect light properly. Stanley Kubrick then decided to use a transparent cube, but that proved to be too difficult to use because of the reflections created by the studio lights. Next came a rectangular monolith cast from Lucite that looked unconvincing, and finally the familiar black slab.

Keir Dullea (Dave Bowman) and Douglas Rain (HAL 9000) are the only actors to reprise their roles in 2010: The Year We Make Contact (1984).

The joke working title, "How the Solar System was Won", reflected the original idea for the film. Just as How the West Was Won (1962) was a series of short stories spanning decades, this film was going to be a series of stories showing explorations on many planets and moons, ending with "The Sentinel" showing the uncovering of the monolith on the Moon, which was the first contact with extraterrestrials. A genuine working title was "Voyage Beyond the Stars". When Fantastic Voyage (1966) was released, Stanley Kubrick reportedly so disliked that film that he did not want his film to sound anything like it. In the end, "2001" was chosen as it is the first year of both the 21st century and the 3rd millennium. In 1999 Arthur C. Clarke held a press conference in which he said he was dismayed that so many people (including college professors and journalists) were incorrectly calling 2000 the beginning of the century.

The soundtrack includes quotations from four pieces by György Ligeti ("Aventures", "Requiem", "Atmosphères", and "Lux Aeterna"). The music was used without Ligeti's permission, and he did not find out about it until he attended the movie's Vienna premiere.

Some of the "Dawn of Man" African sequences used the sounds of wild cats, gorillas and chimpanzees originally recorded for the MGM film Mogambo (1953). The sounds were authentic and actually recorded in locations throughout Africa during the making of "Mogambo" while it was being shot on location there.

The film was originally to have ended just as it had in the book, with Bowman discovering the third monolith on Saturn's moon Japetus. This idea was scrapped, however, because the special effects crew was unable to make convincing-looking rings around Saturn. Effects artist Douglas Trumbull eventually perfected a technique for making the rings after production was completed, and used Saturn's rings to great effect in his directorial debut, Silent Running (1972).

HAL 9000 never once says, "Good Morning, Dave," despite this line being one of his most recognized quotations.

Although HAL9000 is depicted in the film as an expert chess player, the actual on-set computer was a very weak chess player. This caused much amusement for Stanley Kubrick, himself an expert player, who would routinely beat the primitive automaton, and called it a "bumbling pisswit".

In interviews at the time of the film's release, Stanley Kubrick said the "Zero Gravity Toilet" sign was the only intentional joke in "2001."

The phrase "See you next Wednesday" is heard for the first time during the scene in which Poole receives birthday greetings from his parents. The phrase would become a trademark of director John Landis, who would use it in many of his movies.

Frank Poole and Dave Bowman watch themselves in a television interview on "BBC 12". This was a play on the fact that, at the time of production, there were only BBC channels 1 and 2. The presenter in this scene is Kenneth Kendall, the first newsreader seen on British TV in 1955.

The "Blue Danube Waltz" was not the first piece of classical music intended for the space station sequence. Stanley Kubrick originally set the sequence to the Scherzo from Felix Mendelssohn-Bartholdy's "Midsummer Night's Dream." Friend of Kubrick's introduced him to the Johann Strauss waltzes during this film's editing stage, and he re-edited the sequence to The Blue Danube for the final version of the film.

Most of the monitor screens used throughout the spacecraft sequences are rear-projection 16mm showing loops of film. Due to Stanley Kubrick's typical multi-multi-take technique, a lot of these loops ended up getting scratched, and if you study some of the screens, particularly in the pod, you can see repeating scratches.

The only scene from the film not shot in the studio was the "skull-smashing" sequence in which Moonwatcher realizes that he can use a bone as a weapon. That was shot in a field a few hundred yards from the studio on a small platform. This allowed for a low-angled shot with a vast expanse of sky in the background, though it also required a halt in shooting whenever a plane flew overhead. They almost ran out of animal skulls as Stanley Kubrick shot take after take. The final shot of the sequence was finally achieved when Kubrick walked back to the studio tossing bones into the air and filming their flight with a hand-held camera.

By the year 2001, some of the product placements had become outdated. RCA Whirlpool, the maker of the zero-gravity food preparation unit on the moon shuttle, had become Whirlpool. The Bell System had been divested and the long-distance service became AT&T. Pan Am had ceased operations as an international air carrier (in fact, the Whirlpool change had already happened by the time of the film's original release).

Film critic Andrew Sarris gave "2001" a negative review when it came out, and one of the things he didn't like about it was the clipped, almost militaristic way the astronauts spoke to each other. Later, after the Apollo 11 moon landing, he said he'd been wrong about that because the real astronauts who landed on the moon spoke in the same clipped, almost militaristic way as the fictional ones in "2001."

The actual "Space Station 5" model, which was about seven feet across, was found a few years after this film was made, discarded in an English field with wild grass growing over its rapidly decaying surface. The model was destroyed by vandals a few days later.

Voted as the sixth greatest film of all time in Sight & Sound's 2012 critics poll.

The chess position and moves that we see are from a game played in 1910 in Hamburg, Germany, between two undistinguished players named Roesch and Schlage. The computer claims that the final position is a checkmate in two moves. Actually, white is not obliged to play the move that HAL suggests (Bxf3), so a checkmate is not in sight. In fact, there are a few more moves left for both players and the chances are good for white to win, if some moves are done correctly. Another result of Stanley Kubrick's fondness for chess is the character Smyslov, named after a Russian champion.

Favorite movie of Christopher Nolan, who directed Interstellar (2014), which has multiple similarities to this film--for example the inside of black holes in both films.

Stanley Kubrick kept the costume of Moonwatcher.

Rather than using bluescreen, Stanley Kubrick filmed all the model shots against black backgrounds and required the compositing work to be done by a team of British animators painting travelling mattes by hand frame-by-frame to mask out each element. When production ended, most of the animators signed onto Yellow Submarine (1968) in order to work on something colourful after spending two years painting little black blobs.

Stanley Kubrick and Arthur C. Clarke expended enormous effort into making everything as realistic as possible. The earth-moving equipment seen on the Moon would actually work on the real Moon.

The end music credits do not list a conductor and orchestra for "Also Sprach Zarathustra." Stanley Kubrick wanted the Herbert von Karajan / Wiener Philharmoniker (Vienna Philharmonic) version on British Decca for the film's soundtrack, but Decca executives did not want the company's recording supposedly cheapened by association with the movie, and so it gave permission on the condition that the conductor and orchestra were not named. After the movie's successful release, Decca tried to rectify its blunder by re-releasing the recording with an "As-Heard-in-'2001'" flag printed on the album cover. John Culshaw recounts the incident in the book "Putting the Record Straight" (1981). In Decca's haste to rush the re-release the recording, the album was issued with a disfiguring pitch waver at the end of each side. In the meantime, MGM released the official soundtrack album with Karl Böhm's Berliner Philharmoniker (Berlin Philharmonic) "Also Sprach Zarathustra" discreetly substituting for von Karajan's version. The always publicity-minded von Karajan, by then permanent conductor of the Berlin Philharmonic, was furious with Decca. Rhino/Atlantic Records' current CD release of the soundtrack purports to restore the von Karajan recording to its proper place.

Stanley Kubrick's decision to use classical music for his score would cost him. Contemporary composer György Ligeti sued over the unauthorized use of his music and the cutting of his piece "Adventures."

Originally Stanley Kubrick had planned to shoot the film in the aspect ratio of 1.85:1. After consultant Robert Gaffney convinced the director that Super Panavision (aspect ratio 2.20:1) was a more visceral experience, Kubrick agreed and got MGM to pay for the photographic process. Since shooting a 70mm space film with monaural sound was frowned upon, Kubrick decided to mix the soundtrack in stereo sound.

The full text of the Zero Gravity Toilet Instructions: ZERO GRAVITY TOILET PASSENGERS ARE ADVISED TO READ INSTRUCTIONS BEFORE USE - 1. The toilet is of the standard zero-gravity type. Depending on requirements, System A and/or System B can be used, details of which are clearly marked in the toilet compartment. When operating System A, depress lever and a plastic dalkron eliminator will be dispensed through the slot immediately underneath. When you have fastened the adhesive lip, attach connection marked by the large "X" outlet hose. Twist the silver coloured ring one inch below the connection point until you feel it lock. - 2. The toilet is now ready for use. The Sonovac cleanser is activated by the small switch on the lip. When securing, twist the ring back to its initial-condition, so that the two orange lines meet. Disconnect. Place the dalkron eliminator in the vacuum receptacle to the rear. Activate by pressing the blue button. - 3. The controls for System B are located on the opposite wall. The red release switch places the uroliminator into position; it can be adjusted manually up or down by pressing the blue manual release button. The opening is self adjusting. To secure after use, press the green button which simultaneously activates the evaporator and returns the uroliminator to its storage position. - 4. You may leave the lavatory if the green exit light is on over the door. If the red light is illuminated, one of the lavatory facilities is not properly secured. Press the "Stewardess" call button on the right of the door. She will secure all facilities from her control panel outside. When green exit light goes on you may open the door and leave. Please close the door behind you. - 5. To use the Sonoshower, first undress and place all your clothes in the clothes rack. Put on the velcro slippers located in the cabinet immediately below. Enter the shower. On the control panel to your upper right upon entering you will see a "Shower seal" button. Press to activate. A green light will then be illuminated immediately below. On the intensity knob select the desired setting. Now depress the Sonovac activation lever. Bathe normally. - 6. The Sonovac will automatically go off after three minutes unless you activate the "Manual off" over-ride switch by flipping it up. When you are ready to leave, press the blue "Shower seal" release button. The door will open and you may leave. Please remove the velcro slippers and place them in their container. - 7. If the red light above this panel is on, the toilet is in use. When the green light is illuminated you may enter. However, you must carefully follow all instructions when using the facilities during coasting (Zero G) flight. Inside there are three facilities: (1) the Sonowasher, (2) the Sonoshower, (3) the toilet. All three are designed to be used under weightless conditions. Please observe the sequence of operations for each individual facility. - 8. Two modes for Sonowashing your face and hands are available, the "moist-towel" mode and the "Sonovac" ultrasonic cleaner mode. You may select either mode by moving the appropriate lever to the "Activate" position. If you choose the "moist-towel" mode, depress the indicated yellow button and withdraw item. When you have finished, discard the towel in the vacuum dispenser, holding the indicated lever in the "active" position until the green light goes on... showing that the rollers have passed the towel completely into the dispenser. If you desire an additional towel, press the yellow button and repeat the cycle. - 9. If you prefer the "Sonovac" ultrasonic cleaning mode, press the indicated blue button. When the twin panels open, pull forward by rings A & B. For cleaning the hands, use in this position. Set the timer to positions 10, 20, 30 or 40... indicative of the number of seconds required. The knob to the left, just below the blue light, has three settings, low, medium or high. For normal use, the medium setting is suggested. - 10. After these settings have been made, you can activate the device by switching to the "ON" position the clearly marked red switch. If during the washing operation, you wish to change the settings, place the "manual off" over-ride switch in the "OFF" position. you may now make the change and repeat the cycle.

The first film showing a completely revised (and very short-lived) version of the MGM lion logo, which became prominent, however, as the logo of MGM Records and of the MGM Grand Hotel in Las Vegas, Nevada.

In the film, the two astronauts are shown from the side during HAL's observation of their secret conversation. Most experts agree that reading lips from the side is very difficult but not totally impossible. It depends on also being able to be in close proximity, see facial cues and having prior knowledge of the subject of the conversation.

The carry-on bags belonging to the Russian space scientists with whom Dr. Floyd shares a drink are marked "Aeroflot" (in Cyrillic), the Russian national airline.

To create convincing images of nebular movement and starbursts, the crew photographed drops of dye moving on a glass plate.

Stanley Kubrick initially approached Arthur C. Clarke by saying that he wanted to make "the proverbial good science-fiction movie". Clarke suggested that his story "The Sentinel" (1948) about finding an alien artifact on the moon, would provide a suitable premise. Clarke had written it for a BBC competition, but it didn't even make the shortlist. The movie's opening scene has elements in common with Clarke's story "Encounter at Dawn," and the ending is arguably related to his beloved novel "Childhood's End." The screenplay was written primarily by Kubrick and the novel primarily by Clarke, each working simultaneously and also providing feedback to the other. As the story went through many revisions, changes in the novel were taken over into the screenplay and vice versa. The official records say that the screenplay was written in 58 days (13 October 1965-9 December 1965). Shooting began with the "Monolith on the Moon" scene on 29 December 1965. It was undecided whether film or novel would be released first; in the end it was the film. Kubrick was to have been credited as second author of the novel, but in the end was not. It is believed that Kubrick deliberately withheld his approval of the novel as to not hurt the release of the film.

Although the film leaves it mysterious, early script drafts made clear that HAL's breakdown is triggered by authorities on Earth who order him to withhold information from the astronauts about the purpose of the mission (this is also explained in 2010: The Year We Make Contact (1984)). Frederick Ordway, Stanley Kubrick's science advisor and technical consultant, stated that in an earlier script Poole tells HAL there is "... something about this mission that we weren't told. Something the rest of the crew knows and that you know. We would like to know whether this is true", to which HAL responds: "I'm sorry, Frank, but I don't think I can answer that question without knowing everything that all of you know." HAL then falsely predicts a failure of the hardware maintaining radio contact with Earth (the source of HAL's difficult orders) during the broadcast of Frank Poole's birthday greetings from his parents.

The final script removed this explanation, but it is hinted at when HAL asks David Bowman if Bowman is bothered by the "oddities" and "tight security" surrounding the mission. After Bowman concludes that HAL is dutifully drawing up the "crew psychology report", the computer makes his false prediction of hardware failure. Another hint occurs at the moment of HAL's deactivation when a video reveals the purpose of the mission.

In an interview with Joseph Gelmis in 1969, Kubrick stated that HAL "had an acute emotional crisis because he could not accept evidence of his own fallibility".

The HAL 9000 computer was inducted into the Robot Hall of Fame in 2003 (inaugural class).

Stanley Kubrick rejected Martin Balsam's interpretation of HAL as he felt that too much emotion was creeping into Balsam's delivery.

Despite his work earning a BAFTA for Best Cinematography, Geoffrey Unsworth did not enjoy the experience of working with Stanley Kubrick (like several cameramen before him). He told fellow cinematographer Oswald Morris (who had shot Lolita (1962)) that he felt he had no real creative input into the film due to Kubrick's uncompromising control of every aspect of the picture. "He [Kubrick], would give me the set-up and I would go in and light it", he told Morris.

Incrementing each letter of "HAL" gives you "IBM". Writer Arthur C. Clarke claimed this was unintentional, and if he had noticed ahead of time, he would have changed it. HAL stands for Heuristic Algorithmic Computer. IBM product placements appear in the movie as well, including the computer panels in the spaceplane that docks with the space station, the forearm control panel on Dave's spacesuit, and the portable viewscreens on which Dave and Frank watch "The World Tonight".

Marvin Minsky, one of the pioneers of neural networks who was also an advisor to the film-makers, was almost killed by a falling wrench on the set.

The film's spaceships were models made from wood, fiberglass, Plexiglas, steel, brass and aluminum. The fine details that forever would change the look of space on the screen were created with heat-forming plastic-cladding, flexible metal foil, wire tubing and thousands of tiny parts taken from hundred of plastic model kits--everything from railroad cars and battleships to airplanes and Gemini spacecraft--bought at a European toy fair. The fine details made it possible for the cameras to get as close to the models as possible with no loss of believability.

Stanley Kubrick was initially forced by MGM to have Alex North (who had written the score for Kubrick's Spartacus (1960)) compose an original score for this film. Kubrick, however, always intended to use classical music for the film. He allowed North to score the first half of the film before informing him they planned to use only sound effects for the second half. It wasn't until he was watching the film at its premier in New York that North discovered that his music had not been used. He later reused themes composed for this film in The Shoes of the Fisherman (1968), Shanks (1974) and Dragonslayer (1981). North's original score was unheard for 25 years until composer Jerry Goldsmith re-recorded it for Varese Sarabande in 1993. In 2007, however, Intrada, working with North's estate, released North's personal copies of the 1968 recording sessions on CD.

Although all advertisements, as well as the soundtrack album and the movie's closing credits, claimed that the film was released in Cinerama, it was not shot in the Cinerama process (three synchronized films that would be shown by three synchronized projectors on a huge, curved screen). All Cinerama films from 1963 on were shot by one camera on 65mm film with a special anamorphic lens that would then project a blown-up image onto the curved screen. This film initially did such poor box office that MGM actually considered pulling it from Cinerama release after completion of a 30-day run. The exhibitors began reporting that audiences were not only increasing, but it was noted that some audience members had come to see the film multiple times. It eventually became one of MGM's biggest hits, yet was the only film to be pulled from Cinerama venues while it was still making a good profit. MGM was anxious to release its completed production Ice Station Zebra (1968).

The bulging 'eye' of Discovery One's infamous computer was a Nikkor 8mm f/8 fisheye lens provided by the Nikon Corporation of Japan.

To create the facial make-up for the australopithecines, technicians first made a plastic skull substructure with a hinged jaw. After making molds of the actors' faces, the make-up men applied rubber skin to their faces and added hair one strand at a time, as if they were making a wig. Lip movements were achieved by using false teeth and tongues to hide the actors' real mouths. This freed the actors to use their tongues to operate remote controls that moved the lips. Only the actors' eyes were visible, and the masks were made up right to the eye-lids.

Floyd and everyone else on the Moon walk around completely normally. The Apollo landings later revealed that a loping gait was required in the Moon's 1/6 gravity.

During the trip Bowman takes after leaving the Discovery, some of the images seen are tinted footage of the Isle of Harris in the Outer Hebrides.

Throughout the shoot, Stanley Kubrick carried a Polaroid camera with him and would use it to photograph each setup before it was filmed. He had calibrated a way to determine from the appearance of the instantly developed Polaroid photos what would be the proper exposure settings for the film cameras.

The reason why the Discovery and the pods are powdery white, is from Kubrick's research of NASA's suggestions that spacecraft In the future would be manufactured from the non-ferrous properties of advanced ceramics.

If you consider the relative positions of Bowman when he first arrives in the suite, when he is next standing in the room, when he is in the bathroom, when he is at the table, and when he is in the bed, these points form a star.

The television interviewer explains that gaps of seven minutes each were edited out of the broadcast as signals raced between Earth and the hugely distant Discovery crew. Given that the resulting interview ran about four minutes and there were nineteen such gaps, the interview must have taken about 2 hours 17 minutes to tape, unless the questions and replies were all sent in single bursts and reedited later.

The movie has many instances of product placement for IBM. The most apparent are the computer panels in the space plane that docks with the space station, the forearm control panel on Dave's spacesuit, and the portable viewing screens on which Dave and Frank watch "The World Tonight."

Astronomer Carl Sagan wrote in his book The Cosmic Connection that Arthur C. Clarke and Stanley Kubrick asked his opinion on how to best depict extraterrestrial intelligence. Sagan, while acknowledging Kubrick's desire to use actors to portray humanoid aliens for convenience's sake, argued that alien life forms were unlikely to bear any resemblance to terrestrial life, and that to do so would introduce "at least an element of falseness" to the film. Sagan proposed that the film suggest, rather than depict, extraterrestrial superintelligence. He attended the premiere and was "pleased to see that I had been of some help." Kubrick hinted at the nature of the mysterious unseen alien race in 2001 by suggesting, in a 1968 interview, that given millions of years of evolution, they progressed from biological beings to "immortal machine entities", and then into "beings of pure energy and spirit"; beings with "limitless capabilities and ungraspable intelligence".

The scene on board the spacecraft taking Dr. Floyd to the moon in which the flight attendant walks up the side of the ship's interior and appears to be upside down was filmed with a stationary camera bolted to a room set that revolved, so the actress was always on the bottom but it was she, not the set, that appeared to change position. The technique was invented by silent-film comedian Buster Keaton for the final scene of his 1924 film "The Navigator," in which he and his girlfriend (Kathryn McGuire) are rescued from a derelict ship by a submarine that turns over underwater. The same system was used by Fred Astaire for his solo dance to the song "You're All the World to Me" in "Royal Wedding" (1951).

One of the only MGM films in which Leo the Lion does not roar at the beginning.

Shortly before the film was released, Stanley Kubrick's scientific advisor, Frederick Ordway III, wrote him a long memo urging him to restore the voice-over narration Kubrick and Arthur C. Clarke had originally included (much of which ended up in Clarke's novel of the film) to explain the plot. Kubrick did not.

When the space pod is first seen inside the hotel room, there is a diminishing hum noise. This is actually the sound of the pod slowing down after the great speed through the StarGate.

The film originally opened with a ten-minute black-and-white opening sequence featuring interviews with actual scientists, including Freeman Dyson, discussing off-Earth life. Stanley Kubrick removed it after an early screening for MGM executives. Of the scientists, Carl Sagan was the only one who requested a fee.

The band M83's song "Lower Your Eyelids to Die With the Sun" was written to be synced with the "Stargate" sequence.

While the australopithecine make-up was being designed, computer technicians ran a program to determine how long it would take to make the number of costumes they needed. When the program said it would take nine years, they simplified the make-up.

Stanley Kubrick insisted that the artists paint the Earth very pale blue because its albedo is 0.38. Only a few years later, photos from the Apollo missions made everybody realize that this figure is averaged over the pure white clouds and the deep blue oceans. Jupiter and its moons were also intentionally depicted vaguely because of the limitations of ground-based telescopes.

Magazine "poll" places won by this movie: In 2002, named by "Positif" (France) as #1 in both critics' choice and readers' choice of 50 best films in 1952-2002. In 2007, named by American Film Institute as #15 Greatest Movie of All Time, and #1 on AFI list of the 10 greatest "Sci-Fi" films, June 2008. "Open the pod bay doors, HAL," #78 (out of 100) of AFI's best movie quotes. "Dave, my mind is going, I can feel it," #82 of "The 100 Greatest Movie Lines," Premiere, 2007. A poster was #10 of 25 Best Movie Posters Ever, Premiere Magazine.

The film's depiction of the lunar landscape owes much to the craggy, mountainous terrain that was common in science fiction before the Apollo landings. Nonetheless the film is surprisingly accurate given that the production predated even the Surveyor probes, let alone manned exploration.

The film inspired David Bowie's 1969 breakthrough single "Space Oddity" (hence the title), which was written about an astronaut stranded in space.

To create the space ride at the film's climax, Douglas Trumbull combined aerial footage of Monument Valley, Utah, shot through colored filters, with other aerial shots originally made for Stanley Kubrick's Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964). He also invented a split-scan effect by keeping the camera's shutter open to expose a single frame of film while he moved the light source toward the camera to create fantastic light patterns.

Most of the effects shots were made during ten- to 12-hour workdays, with some takes lasting hours. Although the crew was large, the only sound audible in the studio during each take was the sound of the Panavision camera's motors and the sound of the motors moving the ships. One technician compared it to driving a tank.

This film was shot at MGM's Borehamwood Studios next door to where the TV series The Prisoner (1967) was being filmed. "Prisoner" star Patrick McGoohan borrowed some special effects footage of a starry sky for his episode The Prisoner: The Chimes of Big Ben (1967). This footage was not used in the broadcast version of the episode but is visible in an early edit that was later released on video.

Deleted scenes include details about the daily life on Discovery, additional space walks, astronaut Bowman retrieving a spare part from an octagonal corridor, a number of cuts from the Poole murder sequence including the entire space walk preparation and shots of HAL turning off radio contact with Poole--explaining HAL's response that the radio is "still dead" when Bowman asks him if radio contact has been made--and notably a close-up of Bowman picking up a slipper during his walk in the alien room; the slipper can still be seen behind him in what would have been the next shot in the sequence.

The actors hired to play the australopithecines in the "Dawn of Man" sequence were mostly mimes and dancers, though they also used two baby chimpanzees as the tribe's children. They chose actors with thin arms and legs and narrow hips so that the fur added to make them look like australopithecines wouldn't appear too bulky. Stanley Kubrick's fear was that the body fur might make them look like actors in B-movie gorilla suits.

The four acts of the film, in sequential order, are named thus: 'The Dawn of Man', 'TMA-1', 'Jupiter Mission' and 'Jupiter and Beyond the Infinite'. 'TMA-1' happens to be the only act without its title superimposed in the film.

When referencing the H.A.L. 9000 computer, the Mission Control voice speaks the digit "nine" as "niner." This is copied from standard language used by airplane pilots and air traffic controllers to communicate with each other, in which the English number "nine" is pronounced "niner" so it won't be confused with the German word "nein," meaning "no." More importantly, the term "niner" differentiates from the spoken number "five."

For shots of the spaceships that show people moving through the ships' windows, technicians photographed extras moving, then projected them on the windows with 16mm projectors. This led to one error in the film. The exterior shots of the ship carrying Dr. Floyd to the Moon show other passengers on board, but the interiors reveal that he's alone.

Floyd's daughter (Vivian Kubrick) has a British accent (apart from the word "party", which she pronounces "parrdy"). This reflects the fact that Stanley Kubrick and his family had lived in Britain since 1961, when Vivian was one year old.

In the original storyboard sketches, the Discovery was to have deployable solar arrays near the aft end of the ship. They were not carried through to the final design as they would have caused problems with the photographic effects, as well as the fact that in reality solar arrays were, at the time of filming, useless beyond the orbit of Mars.

Intending to set the film apart from the "monsters and sex" type of science fiction films of the time, Stanley Kubrick used Homer's The Odyssey as inspiration for the title. Kubrick said, "it occurred to us that for the Greeks the vast stretches of the sea must have had the same sort of mystery and remoteness that space has for our generation.

Voted as the second greatest film of all time in Sight & Sound's 2012 directors poll.

The proportions of the monolith, as stated in the book, are 1 x 4 x 9 (1 unit deep by 4 units wide by 9 units tall). The proportions of the projected movie on the screen are 2.2 x 1, or 8.8 x 4, which is very close to the proportions of the monolith's largest two faces - 9 x 4. Whether by design or by accident, viewers are essentially watching the film "through" the monolith as if it were laid out horizontally.

According to biographer Vincent Lobrutto, one of Stanley Kubrick's visual-and aural-inspirations was the 1960 National Film Board of Canada animated short documentary Universe (1960). The 29 minute film, which had also proved popular at NASA for its realistic portrayal of outer space, achieved "the standard of dynamic visionary realism that he was looking for." Wally Gentleman, one of the special effects artists on Universe, worked briefly on 2001. The short film's most notable influence may have been Kubrick's decision to cast the narrator of the documentary Douglas Rain, relatively unknown outside Canada, as the voice of HAL.

The "buttons" that Dave Bowman presses to arm the depressurization sequence of the pod are the valves of the seat portion of a Martin-Baker aircraft ejection seat's personal equipment connector (PEC). The valves sealed the pilot's air services such as oxygen, pressure jerkin, anti-g suit and air ventilation (depending on the specific aircraft requirements) when the seat was not in use. Below the valves can be seen the brass intercom connections. The component seen could possibly have been salvaged from a series 4 seat fitted to an English Electric Lightning.

In Chicago, a group of hippies went to the film several times, sitting in the front row until the intermission. Then they would move to the floor in front of the screen to watch the final star ride from the closest possible point.

Included among the American Film Institute's 1998 list of the Top 100 Greatest American Movies.

Although a narrator was in original drafts of the screenplay, this ended up being the first of Stanley Kubrick's movies (and one of only three, along with The Shining (1980) and Eyes Wide Shut (1999)) to not use spoken narration at some point. Title cards, however, are used to separate sections of the movie (a technique also later used in "The Shining").

Stanley Kubrick involved himself in every aspect of production, even choosing the fabric for his actors' costumes and selecting notable pieces of contemporary furniture for use in the film.

The documentary film Doroga k zvezdam (1957) is believed to have significantly influenced Stanley Kubrick's technique, particularly in its accurate depiction of weightlessness and a rotating space station. Encyclopedia Astronautica describes some scenes from 2001 as a "shot-for-shot duplication of Road to the Stars". Specific comparisons of shots from the two films have been analyzed by the film-maker Alessandro Cima. A 1994 article in American Cinematographer says, "When Stanley Kubrick made 2001: a Space Odyssey in 1968, he claimed to have been first to fly actor/astronauts on wires with the camera on the ground, shooting vertically while the actor's body covered the wires" but observes that Klushantsev had preceded him in this.

Both Tom Hanks and Gale Anne Hurd named this as their favourite film in an AFI poll.

MGM took a four-page advertisement in the New York Times, the Los Angeles Times and the Washington Star to launch its publicity campaign for the film on 25 February 1968.

This was the first film to make extensive use of front projection to provide backgrounds against which the actors worked. Using large transparencies, the crew projected the African landscape on the set for the "Dawn of Man" sequence. The same technique was used for the scenes of the moon landing.

The only movie directed by Stanley Kubrick that has a sequel. However, as of 2018 a movie of Doctor Sleep, Stephen King's sequel to The Shining, is in development

Stanley Kubrick hired a company that made artificial limbs to produce a long-fingered, narrow monkey-like hand to be operated by remote controls placed within the costume's arms. When this didn't look convincing, it was abandoned at great expense.

Foresaw the Apple iPad tablet design which looks amazingly similar to the portable tablet-like devices Bowman and Poole use to watch BBC news during their meal.

Having HAL read lips was Gary Lockwood's idea, when Stanley Kubrick and Arthur C. Clarke were stumped on a way for HAL to get wind of the astronauts' plan to deactivate him.

Early drafts included a prologue containing interviews with scientists about off-Earth life, voice-over narration (a feature in all of Stanley Kubrick's previous films), a stronger emphasis on the prevailing Cold War balance of terror, and a different and more explicitly explained break-down for H.A.L. Other changes include a different monolith for the "Dawn of Man" sequence, discarded when early prototypes did not photograph well; the use of Saturn as the final destination of the Discovery mission rather than Jupiter, discarded when the special effects team could not develop a convincing rendition of Saturn's rings; and the finale of the Star Child detonating nuclear weapons carried by Earth-orbiting satellites, which Kubrick discarded for its similarity to his previous film, Dr. Strangelove. The finale and many of the other discarded screenplay ideas survived into Clarke's novel.

Selected by the Vatican in the "art" category of its list of 45 "great films."

In the original theatrical release, the film's Intermission was placed just when Bowman and Poole discuss the AE-35 unit and HAL's take on it, out of 'ear' shot from HAL.

According to the book "The Making of 2001: A Space Odyssey", John Lennon was quoted as saying that the film should be shown in a temple 24 hours a day, 7 days a week.

In Roger Ebert's personal top 10.

The first design for the monolith was a tetrahedron, but Stanley Kubrick thought that would make people think of pyramids. Next they tried a transparent cube, but it was too hard to keep it from reflecting the camera crew's lights. They tried a Lucite slab, but that didn't look convincing. Finally, they settled on the black slab shown in the film.

Although it is not explicitly stated, the crew of the Pan Am shuttle wear Velcro slippers in order to walk around the cabin in zero-gravity. Hence the close-up on the stewardesses feet at the beginning of the flight. There is also a brief mention of Velcro slippers in the instructions to the zero-gravity toilet on the shuttle.

The first science fiction movie shot on 65mm film.

There is a mark difference in tone in which Dave and Frank interact with HAL. Whereas Dave is friendly, Frank is somewhat cold. For one, Dave always ends his instructions with "please." He also openly listened when HAL related to him that there were some peculiarities about the mission. Frank however treats HAL exactly as he is, an on board computer programmed to run the ship. When the AE35 Unit failed, Frank was first one to doubt HAL's abilities

When Tim Burton parodied "2001" in his film "Charlie and the Chocolate Factory," he used the same recording of Richard Strauss's "Also sprach Zarathustra" that Kubrick had: the 1959 Vienna Philharmonic version conducted by Herbert von Karajan and produced by John Culshaw for British Decca. The recording, uncredited in Kubrick's film, is fully credited in Burton's.

This is the only time that Stanley Kubrick was nominated for a Best Director Oscar in a non-Best Picture nominated film.

In the segment where Bowman tries to rescue Poole, Keir Dullea had to do the airlock scene himself. Since Bowman had left in the pod without his helmet, there was no way to disguise a stunt double.

The animal used in the "Dawn of Man" sequence, the one that looks like a black pig with a trunk, is a tapir.

Was voted the 26th Greatest Film of all time by Entertainment Weekly.

It took Stanley Kubrick and his crew months to figure out how to make the pen float during the trip to the Moon. They couldn't come up with a wire fine enough not to show up on film. Finally they taped the pen to a glass plate held in front of the camera. If you look closely, when the stewardess plucks it out of the air, you can actually see her pulling it off the plate.

Keir Dullea was always the first choice, but the Gary Lockwood role was considered for James Coburn, Hugh O'Brian, Rod Taylor or George Hamilton.

Working titles for the film included Across the Sea of Stars, Universe, Tunnel to the Stars, Earth Escape, Jupiter Window, Farewell to Earth, and Planetfall.

The film developed a celebrity cult whose members included Mike Nichols, Mick Jagger, John Lennon, Franco Zeffirelli, Roman Polanski and Richard Lester. Cass Elliot said the film had changed her "chemistry."

HAL's first words are not to Dave Bowman, rather to Frank Poole--"Excuse me, Frank."

Is considered by many to be the greatest science-fiction film of all time.

The film's title card is set in Gill Sans, one of the classic sans-serif fonts. The zeroes in "2001", however, are the typeface's upper case Os (letters) rather than its 0s (numbers).

It has been claimed that one of the australopithecines in the Dawn of Man sequence was the British comedian and actor Ronnie Corbett. Corbett did, in fact, audition for the part, but was unsuccessful.

The proto-hominids in the opening sequence are all about the same size, but current theories and fossil evidence suggest that the males should've been substantially larger than the females.

When Floyd exits the Space Station V elevator, he is greeted by an attendant seated behind a slightly modified George Nelson Action Office desk from Herman Miller's 1964 "Action Office" series. First introduced in 1968, the Action Office-style "cubicle" would eventually occupy 70% of office space by the mid-twenty-naughts.

The National Film Archive of Japan showed the "unrestored" 70mm prints from the 2018 Cannes Film Festival in Oct, 2018. In order to make the cinematic experience as close as possible to the 1968 theater experience, the theater showed the film with dual projectors instead of a film platter, and the theater lighting and the curtain timing was same as 1968 and are precised down to seconds. These are the timing that was used during the film. For opening, overture 2 minutes and 53 seconds, dimmed lights, closed curtain, before the MGM logo shows up, lights out, and open curtain. For intermission, the "intermission" was showed for 26 seconds, and intermission for 15 minutes. For the second half, intermission music 2 minutes and 18 seconds, dimmed lights, closed curtain, before the movie starts, lights out, and open curtain. For closing, 10 seconds before the "The End" disappear, the lights up, and curtain fully closed, post-credit exit music 4 minutes and 23 seconds.

Although the memories of many Los Angeles residents insist that this opened at the famous Cinerama Dome on Sunset Blvd., it actually opened at the Warners Cinerama Theater on Hollywood Blvd., and played there for months. It did not play at the Dome for several years.

Early drafts had the ship powered by an Orion Drive.

In 1977 Marvel Comics published an adaptation of the film by legendary artist-creator Jack Kirby. Kirby - who had explored the idea of godlike extraterrestrials in his Fourth World and Eternals series - took enthusiastically to the adaptation and expanded the concepts in an ongoing series. While the ongoing series was not a success, it did introduce the character Machine Man, a sentient android given a humanoid personality through contact with the monolith. The character remains in regular Marvel continuity with references to the Kubrick film ret-conned out of his origin.

Federico Fellini considered HAL's death to be particularly sad.

In Clarke's novels, the dimensions of the monolith are always 9 x 4 x 1. These do appear to be the dimensions seen in the first two encounters in the film (the Dawn of Man and Lunar scenes), but the monolith becomes visibly broader in the latter two encounters (the Jupiter and closing scenes).

The film is included on Roger Ebert's "Great Movies" list.

Among the model-makers was David Peterson, later Wales' foremost sculptor and a prominent nationalist activist.

Floyd's daughter (Vivian Kubrick) appears to be under five years old. Since she was born in 1960, this would indicate that her part of the videophone conversation was shot quite early in the production, which began filming in late December 1965, or even prior to it.

Final film of Ann Gillis.

Heywood Floyd asks his daughter what she would like for her birthday and she replies, "A Bush Baby". Apes in Fongoli have recently been observed fashioning spears from tree branches and using them to wound and kill Bush Babies in their nests. This is the first time such use of tools by animals other than humans has been observed. One wonders if Kubrick might have known about this behavior and included this scene as a little joke.

The film never actually tells us in what year it is set. The title leads us to assume it is set in 2001, but since there is an 18-month gap between the Heywood Floyd chapter and the David/HAL chapter, only one of these two sections can take place in 2001.

The film prominently uses two pieces of music by two composers who coincidentally share the same last name: Johann Strauss ("The Blue Danube") and Richard Strauss ("Thus Spake Zarathustra").

During its legal battles with Apple over the origin of the computer tablet, Samsung unsuccessfully argued that its Galaxy tablet did not infringe on Apple's iPad design based on the convincingly tablet-like devices Dave and Frank watch during their meals.

In the French version, Dr. Heywood Floyd's middle name is Richard.

HAL made mention of the phrase "The quick brown fox jumps over the lazy dog". This phrase is well-known in Computer Science, as a way to test the display of new fonts. It is also employed as a form of error-correction and testing encryption algorithms.

Vivian Kubrick: the daughter of Stanley Kubrick plays Dr. Floyd's daughter.

Stanley Kubrick: [Bathroom] David Bowman explores the bathroom next to his celestial bedroom after travelling through the Star Gate.

Stanley Kubrick: [zoom] as Dr. Floyd reads the zero-g toilet instructions.

Stanley Kubrick: [Denial] HAL refuses to open the pod bay doors for Dave.

Stanley Kubrick: [Insanity] HAL's distortion from lying.

Stanley Kubrick: [First Person Shot] HAL's perspective is shown in many shots.

Although it's commonly believed that the famous "jump cut" is from the bone being tossed in the air to a ship floating in space, it is in fact not a spaceship, it's a nuclear device circling the earth. So the bone being used as the "first" murder weapon is thrown to the "ultimate" weapon. Originally the "star child" was to detonate this device and all the other devices that were circling the earth. Stanley Kubrick decided against the ending as it was too similar to the end of his previous film Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964), where nuclear bombs are exploded.

HAL sings "Daisy Bell" (or "A Bicycle Built for Two") as he is shut down. This vaudeville song had already been used as one of the earliest pieces of electronic music, as it was was the first song ever programmed into a computer to be played back using a simulation of speech synthesis. The machine was an IBM 7094 that was located at Bell Labs in 1961. Furthermore, the lyrics include the phrase "I'm half crazy."

According to Rolling Stone magazine, during one screening a young man rose as if in a trance at the monolith's reappearance near the end and ran down the theatre's aisle shouting "It's God! It's God!" Before the theatre's management could stop him, he had crashed through the screen.

One of Stanley Kubricks additions to the screenplay which Arthur C. Clarke did not like was HAL's ability to read the astronauts' lips when they are inside the pod. Years later, he admitted that Kubrick had been right all along, after learning that at the time, computers were being developed with the ability to read lips.

Just like in Arthur C. Clarke's short story 'The Sentinel', the finding of the monolith on the moon would initially be the film's climax. This eventually became the kick-off for the movie's second half. But even during production, the ending of the movie was still under constant revision. Stanley Kubrick initially planned to show extra-terrestrials, but found out that the production's budget was quickly running out. He finally decided that it would be better to not physically show the aliens at all, stating that "you don't show God".

Keir Dullea spent 12 hours in make-up for his on-screen scenes as an old man.

In the sequence in which Bowman recovers Poole's body with the pod, the camera was running at four times normal speed so that the resulting footage would be in slow-motion, giving a slow, "drifting in space" look. That means the soft contact of the pod's arms with Poole's body was actually rather rough, and as a result, the stunt man doubling for Poole was badly bruised by the end of the takes.

According to the film's sequel 2010: The Year We Make Contact (1984), the last received communication of David Bowman was "My god, it's full of stars!" Although this was never actually said in this film, in the novel David Bowman did utter those words before entering the wormhole.

When filming Dave and Frank's private conversation in the pod, Stanley Kubrick found the scene as scripted to be too long. He asked Keir Dullea and Gary Lockwood to instead improvise their lines over several takes.

Arthur C. Clarke and Stanley Kubrick disagreed on what HAL's birthday should be. Kubrick wanted HAL to be about the age of a child, so his death would have more emotional impact. Clarke insisted that such an old computer would not be used for an important mission. In the book, HAL's age was four years (12 January 1997), while in the movie it was nine years (12 January 1992). This disagreement resurfaced nearly 30 years later when film critic Roger Ebert held a birthday party for HAL 9000 by screening this film in Urbana, IL, in 1997, the date and place of HAL's birth in the novel (Ebert was also born in Urbana). Clarke and Kubrick were both invited. Clarke accepted his invitation and made an appearance at the festivities via satellite, but Kubrick declined, stating that they missed HAL's birthday in 1992. Another inconsistency in this scene is the name of HAL's first instructor. It is Mr. Langley in this movie but is Dr. Chandra in all other books and movies in this series. Since HAL is saying all this while being shut down, this could be interpreted as a result of memory failure.

At the end of the film, the only space-suit that was never used is the blue one. In 2010: The Year We Make Contact (1984), the blue suit is missing its helmet, apparently because the producers thought that Dave used it in this film when disabling H.A.L. Dave is actually wearing a green helmet, from the green suit which was stowed inside the emergency airlock.

Stanley Kubrick was very well read. It is rumored that the image of the star-child came to him from the "Spirit of the Earth" in Percy Bysshe Shelley's "Prometheus Unbound": "Within the orb itself, Pillowed upon its alabaster arms, Like to a child o'erwearied with sweet toil, On its own folded wings and wavy hair The Spirit of the Earth is laid asleep..."

Despite its G-rating, there are five on-screen murders: an australopithecine, Frank Poole, and the three hibernating astronauts killed by H.A.L. The dialogue also includes the words "hell" thrice and "damn" twice.

The script went through many stages. In early 1965, when backing was secured for the film, Arthur C. Clarke and Stanley Kubrick still had no firm idea of what would happen to Bowman after the Star Gate sequence. Initially all of Discovery's astronauts were to survive the journey; by October 3, Clarke and Kubrick had decided to leave Bowman the sole survivor and have him regress to infancy. By October 17, Kubrick had come up with what Clarke called a "wild idea of robots who create a Victorian environment to put our heroes at their ease."

The first words in the film are spoken to Dr. Heywood Floyd (William Sylvester) and the last words are spoken by Dr. Floyd.