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The zero-gravity of space is simulated by flying a series of parabolic flight manoeuvres that counter the forces of gravity and allow astronauts and cosmonauts to learn how to accomplish tasks with no gravity. ³ÉÈË¿ìÊÖ Reporter, Martin Redfern, tries out ‘zero gravity’ in a parabolic flight. Originally broadcast on 28 May, 2009. (Photo Credit: MEHDI FEDOUACH/AFP/Getty Images)
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