Human beings are quite creative creatures; they often try to simplify their lives by discovering new things. Aiming at simplifying and bettering the quality of life, a human has made many various inventions. Nowadays, we cannot imagine our lives without any of these inventions. If you look at the stuff in your house or at your workplace, you can only wonder how inventive a human is. The development of such essential things as a house, a chair, a wheel, a plate, and a fork, were a considerable advance at the proper time even though we do not see such things as significant.