elephant graveyards: fact or fiction?

FICTION!  

many people think that elephant graveyards are made because elephants know theyr'e going to die and they go to their grave.  on the other hand, elephants have 5 sets of molars throughout their lifetime.  once their last set falls out they have to eat mushy food so they head to the swampy grounds where the plant life is softer and they can eat without teeth.