In one of my recent "10 Things I'm Grateful For" articles, I mentioned the Fibonacci sequence. What's that?
This website, "Math is Fun," explains it well and even has a neat little interactive gadget to show you how the Fibonacci numbers affect what you see. The numbers are part of the "Golden Ratio" as seen throughout nature. It's beautiful! Just have a look at a few of my photos to see what I mean. If you click on the image, you should see a bigger version.