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ArtistThe radiation environment of deep space is very different from that on the Earth's surface, or in low earth orbit, due to the much larger influx of high-energy galactic cosmic rays (GCRs). Like other ionizing radiation, high-energy cosmic rays can damage DNA and increase the risk of cancer, cataracts, and neurological disorders.[15] One known practical solution to this problem is surrounding the crewed parts of the ship with a thick enough shielding such as a thick layer of maintained ice as proposed in The Songs of Distant Earth, a science fiction novel by Arthur C. Clarke (note: in this book the ship's mammoth ice shield is only in the forward part of the ship, preventing micrometeors from damaging the ship during its interstellar journey).