From: none@nowhere.com   
      
   If at some future time evidence of biological presence on Mars is ever   
   discovered (e.g. bacteria), how will scientists be sure it's not just   
   contamination from previous Earthcraft that landed there?   
      
   Surely NASA doesn't claim that it's probes etc are guaranteed sterile when   
   they land... or do they?   
      
   Orilly   
      
      
   (Named after the time I get up)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)