Facts & Real time usage

• It's impossible to lick your elbow.
  
  As if I don't have better things to lick.
• Hippopotamus can run faster than a man.
  
  You can't catch a Hippo by running behind!
• The word 'listen' contains sames words in 'silent'
  
  If I tell 'listen' , you should be silent
• The only 15 letter word without repeating an alphabet is 'uncopyrightable'.
  
  That's why it's uncopyrightable
• Aryabhatta from India has invented 0
  
  Othewise I wouldn't have received zero marks in my exams.