Going in circles
![An enso circle](https://skipbirong.com/wp-content/uploads/2013/03/images5-150x150.jpg)
I was clicking through TV stations a couple of weekends ago leading up to the Daytona 500 when I stumbled upon a NASCAR race in progress. I watched the action for a bit as the cars careened around the track at nearly 200 miles per hour while, for the most part, remaining only inches apart–something which I more or less do each morning on my way to work. Thus, in short order, I found the whole affair pretty boring. First of all, there are exactly four corners on that track, so it quickly became apparent that any real excitement was most likely to occur just as the pack was entering or leaving a turn (or, in my case, an amber traffic light). In between, of course, there was the rapid increase in speed on the straight-aways, and then braking for a turn. And so on. And so on. In circles, unending.