On 25/12/12 12:27 AM, Bj”rn Felten -> David Drummond wrote:   
    DD>> Actually, up is defined as "away from the centre of the Earth"   
      
    BF>     Defined by whom?   
      
    DD>> I got full marks for that (an open minded teacher).   
      
    BF>     Good for you!   
      
    BF>     But I still would want to know who defines what's up and down. All   
    BF> jokes aside...   
      
   Maps are generally drawn with north to the top as most of the original mapping   
   was done by explorer from the northern hemisphere. They had the opinion that   
   they were on top (hence the expression "down under").   
      
   --    
      
   Regards   
   David   
      
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