Trivia: Both director Stanley Kubrick and author Arthur C. Clarke originally chose Jupiter as the Discovery's destination, and production of the Jupiter sequences and elaborate special effects were already finished ("in the can") when Kubrick abruptly decided to change the destination to Saturn. Kubrick thought Saturn with its rings would be more visually exciting than the Jupiter footage that he had already finished, so he ordered his special effects team to begin work on the Saturn effects. At the same time, Arthur C. Clarke changed the destination to Saturn in his "2001" novel that he was writing concurrent with the movie's production. Stanley Kubrick was well known for making such sudden and costly changes in the middle of production, but money wasn't really an issue; in fact, when Kubrick showed MGM studio heads and investors his early special effects footage, they were so awestruck that they all agreed to pay any price for the finished film. The real reason that Kubrick didn't go to Saturn was the protest of his exasperated special effects team, who had spent an enormous amount of time and effort on the already-completed Jupiter footage and had stretched their ingenuity to the point of exhaustion. The FX artists and technicians were extremely proud of their work and argued against simply discarding it to the cutting room floor. Kubrick, in typical fashion, abruptly dropped the Saturn idea without a second thought and stayed with Jupiter. (Strangely enough, Arthur C. Clarke still thought Saturn was a better destination, so he kept it in his novel, which published shortly after the movie premiered).Charles Austin Miller
Trivia: The scene where Bowman is shown floating through HAL's 'brain' prior to disconnect used a stunt double in a space suit suspended by wires behind him. During one take the wires failed, dropping him to the floor and causing serious injury.
Trivia: Originally the film was going to end with the Starchild activating the nuclear launch platforms orbiting Earth, using the planet's destruction as a means to accelerate the evolution of mankind into its new universally intelligent form. Stanley Kubrick eventually decided against this as it was too similar to the ending of his previous film "Dr. Strangelove".
Trivia: To film Dave Bowman's explosive transition from the pod into the Discovery, a vertical airlock set was constructed. Keir Dullea was suspended on wires and pulled to the top of the set as the camera shot upwards from below. This, combined with the establishing shot of the pod lined up with the airlock door, gave the illusion that he was floating horizontally into the ship - the wires suspending him from the ceiling were hidden behind his body.BocaDavie
Trivia: People speculate that HAL is a reference to IBM, as the letters differ by one position. Kubrick says this is a coincidence, but was concerned about IBM's reaction to the film's references, including the IBM logo on Bowman's spacesuit. However IBM had no problem as long as they weren't associated with the "equipment failure," or listed as technical advisors for the computer.Jennyred
Other mistake: There is something drastically wrong with the design of the spherical 'Aries' moon shuttle. Some seats and many fixtures are 'upside down' relative to the up-down orientation of the shuttle itself, and we see loose food trays and equipment about the place as if this is routine. But - the shuttle is designed to land on the moon. What happens then? The moon has gravity, remember? There are going to be quite a few very disgruntled people dangling upside down like spiders, and there will be loose gear (and perhaps a stewardess or two) bouncing about all over the place. It is not a matter of stowing loose gear or lying flat on landing - some parts of the shuttle are upside down relative to others, which is why the stewardess has to do that famous 180 degree upside down walk. Whichever way you look at it the shuttle is going to encounter serious problems when it reaches a gravity well, which will occur whenever the engines are fired up, never mind landing on the moon.
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