2001: A Space Odyssey (film) what remains is notable for its banality (making the computer HAL seem to have more emotion than the humans) juxtaposed with epic space scenes. Kubrick's decision to avoid the fanciful portrayals of space in standard popular science fiction films of the time led him to seek more realistic and scientifically accurate depiction of space travel. Illustrators such as Chesley Bonestell, Roy Carnon, and Richard McKenna were hired to produce concept drawings, sketches and paintings of the space technology seen in the film. Two educational films that came out previously, the 1960 National Film Board of Canada animated short documentary "Universe"
Technologies in 2001: A Space Odyssey adviser for the film. "2001" accurately presents outer space as not allowing the propagation of sound, in sharp contrast to other films with space scenes in which explosions or sounds of passing spacecraft are heard. "2001" portrayal of weightlessness in spaceships and outer space is also more realistic. Tracking shots inside the rotating wheel providing artificial gravity contrast with the weightlessness outside the wheel during the repair and Hal disconnection scenes. (Scenes of the astronauts in the "Discovery" pod bay, along with earlier scenes involving shuttle flight attendants, depict walking in zero-gravity with the help of velcro-equipped shoes labeled "Grip