If you fold a piece of paper 42 times, it would reach the moon.
For those who don't know how this is possible, if you fold anything its thickness would double every time you fold it. So you have a final thickness of 2^n, that is, two raised to the n-th power. 1 fold = twice the thickness, 2 folds = four times the thickness, 3 folds = eight times the thickness. After 42 folds the final thickness would be more than 4 trillion times the thickness of a paper, that is 2^42 = 4,398…X10^12.
