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  1. Jun 2017
  2. archive.ncsa.illinois.edu archive.ncsa.illinois.edu
    The Horizon Problem
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    1. beasleya 07 Jun 2017
      digipo:date:1995-11-02 digipo:analysis:speed_of_light
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    archive.ncsa.illinois.edu/Cyberia/Cosmos/HorizonProblem.html