From: ceo@offshoreexecutive.com   
      
   On Sat, 04 Sep 2004 20:56:59 -0800, Ron Webb wrote:   
      
   > Lots of problems left, including the 117 day long "days". There are books on   
   > this subject, but I can't find a referance at the moment.   
      
   This is probably the biggest problem.  AFAIK we do not have plant or   
   animal life that can live with days that long, and the human psyche   
   is not up to it, either.   
      
   I am still of the opinion that the most livable places in the solar   
   system are those where the length of a day is at most 50 hours, any   
   more than that and life gets upset.   
      
   Building greenhouses on Mars or even asteroids is probably the easiest   
   way into space.  Lots of sunlight, in intervals short enough.  We know   
   how to build greenhouses and a cubic kilometer of ice and carbon should   
   be enough mass to compensate for a slightly unbalanced biosystem, for   
   a very long time...   
      
   --   
   http://www.offshoreexecutive.com/ Offshore The Boss!   
      
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