Riddle No. 1
  
 I never was, am always to be, no one ever saw me, nor ever will. And yet I am the confidence of all to live and breathe on this terrestrial ball. What am I? 
  
  
 Riddle No. 2
  
 Face with a tree, skin like the sea. A great beast I am, yet vermin frightens me. 
What am I? 
  
  
 Riddle No. 3
  
 I am sometimes strong and sometimes weak, but I am nobody's fool. 
For there is no language that I cannot speak, though I never went to school. 
What am I?