In '20000 Leagues Under the Sea: Science vs Fiction', the Nautilus' ability to withstand the extreme pressure at great depths without any visible signs of strain is a significant fictional element. In real - world science, the materials and engineering required to do that were not available. Additionally, the communication system on the Nautilus seemed to work perfectly underwater, which was not the case in real - world science of that era. The story also presented a very elaborate and almost utopian underwater world, which was far from the understanding of real - world oceanography at that time.