If you are interested in why climbers die on Mount Everest, read Jon Krakauer's amazing first-hand account of Everest's worst disaster:
http://outside.away.com/outside/destinations/199609/199609_i...
http://outside.away.com/outside/destinations/199609/199609_i...
Edit: It occurs to me now that I don't think I even dismissed the author summarily, just that website... I think I will be borrowing a copy of the book from a friend.