Happy Pi Day!

The beauty of pi, in part, is that it puts infinity within reach. Even young children get this. The digits of pi never end and never show a pattern. They go on forever, seemingly at random—except that they can’t possibly be random, because they embody the order inherent in a perfect circle. This tension between order and randomness is one of the most tantalizing aspects of pi.
That's from Why Pi Matters by Steven Strogatz.  I heartily recommend this article.
Look for a picture of me eating Pi later today.