If you were to draw a graph of the development of transportation, it would be a curved line that steadily steepens until it becomes almost vertical in the present times of using trucks, race cars, bullet trains, airplanes and ships. Modern transportation contraptions are conceptualizations of ancient transport means. At one point man used to walk everywhere. Then he started using animals for transport. He had ideas of flying in the air like a bird, moving in the sea like fish and traveling fast on land. As he became more enlightened, the ideas became reality.