As a man cleans his house, he might see a spider that has woven its web in a corner of the house. If he realises that he ought to think about this creature which is normally of no importance to anyone, he will see new doors being opened for him. This tiny insect he sees before him is a miracle of design. There is perfect symmetry in the web the spider has woven. If, by any chance, he wonders how a tiny spider could achieve such astonishingly perfect design, and if he makes quick research, he will encounter some other extraordinary facts: the thread a spider uses is thirty percent more flexible than a rubber thread of the same thickness. The thread the spider produces is of such a superior quality that men use it as a model for the manufacture of bullet-proof vests.