You see them all the time. On bread left around for a while, between your toes. Molds. Dumb fuzzy things. Well not really. Scientists in Japan have taken tiny bits of food and made a map that was just like Japan. Then they took a blob of mold and put it in one place and watched the mold grow. It grew out looking for the food and creating a network that looked kind of like a communications or a transportation network. All without a central brain.  Want to read all about it http://www.sciencemag.org/cgi/content/full/sci;327/5964/419