Mankind has erected some fascinating structures. Elaborate edifices of the ancient world such as the Great Wall of China, the Pantheon of ancient Rome or the Pyramids of Israel are but a few examples of the brilliance human beings can display in design, engineering and craftsmanship. Likewise, today we see great structures that push the limits of mankind's ingenuity and creativity. However, none of these great projects are alive, and none can replicate themselves. We can stand in awe of our finest designs, but we cannot overlook the spectacular displays of engineering found in nature, which surpass even the greatest of man’s creations in terms of complexity. These complex creations cause us to ask a vital question: can complex design be an accident?