Lichens are incredible organisms. They're not plants and not animals. What are they then? A lichen is a composite organism that arises from algae or cyanobacteria (or both) living among filaments of a fungus in a symbiotic relationship (I got that from Wikipedia). Was that too complicated? Never mind, lichens are beautiful, intricate, and simply amazing organisms.Lichens can survive in extreme conditions and they can also live very long. Now lets go and make a lichen garden! Its very easy and simple. And it also looks very pretty as a decorative piece of natural art. Please consider voting for this Instructable in the Indoor Gardening Contest! Thanks!