It is so easy to know what time it is right now by just looking at the clock on the wall or on your desktop.  However, how do people have a time sense back then?  Yup, other simpler inventions were made:

Sundials       

Water clocks     

Hour glass

Modern Clocks

So how does it really work?

control of our brain about our skull major parts of our brain different views of our brain why do we dream? what about nightmares? what about recurring dreams? how to remember our dreams? what do my dreams mean? what about televisions? air conditioners? light bulbs? telephones? clocks? computers?  refrigerators? microwave ovens? Chinese culture? who are the authors?games zone