Have you ever heard how your brain cells communicate with each other? Biologist and author professor Brian Ford recorded the sound of talking brain cells. He shifted the frequencies so that the human ear can hear it. Click on the link above.
Read this article (in Dutch) to learn how intelligent behaviour can emerge from the cooperation of an enormous amount of simple units, like a single brain cell: http://benniemols.blogspot.com/2008/02/hoe-kan-een-mierenkolonie-intelligent.html