เลขรัฐบาล16/9/62

Since humans began to travel long distances to move beyond the primitive hunter-gathering camps of our forebears we have needed to develop more and more impressive transportation technologies to increase the height of each new plateau in our evolutionary development. Early on in the history of transportation, humans primarily moved objects and supplies by hand, and while many cultures still do so today, this is the least efficient method and it is generally avoided unless there is no other choice. Humans are not good pack animals.
from: http://ezinearticles.com/?A-Brief-History-of-Transportation&id=6793150