Oh so today is the second day of 2012

Do you want to hear a bad news? The bad news is....Time cannot reverse. Time only can move forward. Haizz.. Why don't the world scientists, thinker, and maybe us define time??What is time? When time begins? Who can understand time fully? I dare to say that none of us can’t fully understand the subject about time. OK, so what are you going to tell me? Well I hope that there is a time machine. hahahaha. Time machine? Nah, no such thing yet. So right now, I am thinking what makes the earth to orbit in its axis? Why is the motion of earth around the Sun? Why not the Moon? Why not the Saturn? Why is the sky blue? Why not my favorite color red? These are the really silly, stupid question that i often asked. Nah just kidding. What am i trying to say is that we couldn't fully understand something if the inventor didn't tell us. Who can fully understand the function of an Iphone if there is no guideline, no review and etc.???I bet none of us do.. That's the reason why there were /are people like Albert Einstein, Stephen Hawking, Isaac Newton and other more who is/was a physicist that observed and study about the nature.