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Uploaded on Feb 23, 2011
Paolo answers Riccardo Russo, aged 22, from San Cataldo, Sicily, Italy Riccardo asked, on behalf of "Orbiter Forum Italia": How do you get used to the lack of references that indicate up and down in the conventional way we are used on Earth? Did you ever feel a sense of disorientation as a result of this phenomenon? How long does it take to get used to it?