If we are still finding ways and means of improving an invention made over 4,000 years ago, we must realize the tremendous field that lies ahead in improving more recent inventions. And what is still more important, think of the opportunities in the field of principles yet undiscovered. Although man may be very dependent upon this invention, the fact remains that Nature found other means of travel, because the animals, the fish and the birds have been moving on the land, and in the water and air for millions of years. Yet, in all of her myriad of living creatures, Nature has never used our very necessary principle of the wheel. ● |