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    Navigation in Fog
    From: Marcel Tschudin
    Date: 2007 Feb 14, 19:49 +0200

    Just read in German a summary on a published paper. The author(s?)
    investigate(s) whether it was possible for the Vikings to use the
    polarised light of the sky for navigation, this with the help of the
    "sun stone" (Sonnenstein). Those of you who are interested in this may
    read the original paper in English:
    
    Proceedings of the Royal Society London, Series A. Online publication
    of 7th February 2007 (doi: 10.1098/rspa.2007.1811).
    
    Best regards to all of you
    
    Marcel
    
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