Interesting stuff... 7th grader Aidan Dwyer<http://www.amnh.org/nationalcenter/youngnaturalistawards/2011/aidan.html> was walking in the woods during the winter, and looking up, he noticed something about the bare branches above him. They didn't appear to be growing randomly. So he took some measurements of the angles of the branches, crunched some numbers, and wouldn't you know it, he found that the ubiquitous Fibonacci Sequence was behind it all. He suspected there was a reason behind this. That trees were using this pattern to gather more light. So he did an experiment. Using the same number of solar cells, he built two working models. One was a traditional, flat array will all of the panels on a single plane. The other used the Fibonacci Sequence to create the same spiraled pattern he observed in the trees. Read more here ... http://gizmodo.com/5832557/genius-13+year+old-has-a-solar-power-breakthrough