If you fold a paper in half 103 times it'll get as thick as the Universe

The myth: You can't fold a paper in half more than eight times.
 The reality: Given a paper large enough—and enough energy—you can fold it as many times as you want.
The problem: If you fold it 103 times, the thickness of your paper will be larger than the observable Universe: 93 billion light-years. Seriously.