From: wrcousert@yahoo.com   
      
   "Ash Wyllie"  wrote in message   
   news:1074.620T1714T12703402@lr.net...   
      
   > >> Form it into a big hollow sphere, with vacuum in the center. Make it   
   big   
   > >> enough so that the specific gravity is less than sea level air. Drop it   
   > >> into Earth's atmosphere, wait for it to sink to ~300m and tow to where   
   > >> ever.   
   >   
   > >Wouldn't the hollow sphere collapse as pressure increases?   
   >   
   > Not if it is very round.   
   >   
      
   Do we have the technology to build a sphere with a vacuum that is capable of   
   lifting 200 or more passengers to an altitude of at least 10,000 feet above   
   sea level?   
      
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