From: adam.w.krajewski@gmail.com   
      
   So, is it possible to make hybrid atoms with the neutron or proton replaced by   
   different particle? I know you can switch electrons with muons, but is it   
   possible with nucleons? And also, would it allow us to make some interesting   
   materials?   
      
   This question came to me When I was thinking about airships in my sf universe,   
   and which gas would be best for lifting them. Because I don't like neither   
   hydrogen (flammable) or helium (makes many flight procedures more complicated   
   and adds a lot of    
   equipment)   
      
   Any ideas if that would work out?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)