Permutations of Card Shuffling

http://543skills.com/skill-25-how-to-shuffle-cards/

Well, it's exam week, so I thought I would try something fun and simple to get our brains going. My brother told me that he heard that the number of ways a 52-card deck of cards can be shuffled outnumbers the total number of atoms in the universe...

http://amazingwisdom.com/wp-content/uploads/2010/06/stars-universe.jpg