The+wheel

=The Wheel= In the early ages, men put logs under carts called rollers. Rollers were an easier way of moving things. Later, they evolved into a sled type of thing which was just easier than the roller. Soon they combined a sled with a roller which was much easier than a sled. Later there were grooves on the roller with use. The grooves soon became easier to roll with. Then, wheel and axle in one piece, joined by pegs. The wheels fixed by axles which made a crude cart as a shown below. The earliest wheel was found in central Europe 4th millennium B.C. W heels are important because almost everything we use has wheels on it. Without wheels we would have such a hard life. + []