parallel universe explained(II)

  Continue the previous post, parallel universe claims that there are many universes coexist. You may wonder if there is such enormous space to hold so many universes. If you think out of the 3 dimensional box, you can see it is possible. In order to comprehend easily, think about a 2 dimensional world first. In a 2 dimensional world, it is an area with long and width but without height. If I show you a 1000-pages book and ask you how many 2 dimensional area inside the book. You may answer 1000 because each page can be considered as a 2 dimensional area. You may soon notice that a 2 dimensional area has no thickness(i.e. height) while every page has thickness although the thickness is negligible. If you split each page further thinner, you can has more than 1000 2D areas inside the book. As a 2D area has no height, you can therefore split indefinite number of 2D area from a 3D cube. That means any 3D cube can hold indefinite number of 2D areas! Similarly, if there is a 4 dimensional space, it can contain indefinite number of 3 dimensional universes!

  A 4 dimensional world may be a territory of God that human can imagine but cannot understand. When a new parallel world will be created? Some fictions claim that if anyone uses a Time machine to travel to the past, a new parallel world will be produced. That means time machine is a machine that clones the existing world and then set the timeline at a specific past time. Some fictions even imagine that if anyone makes a decision, a parallel world will be produced instantly. For example, if you decide to swim instead of jogging. In the current world you are swimming but at the same time there will be another "you" are jogging in another parallel world.

  What do I feel about parallel universe? I may say it is interesting at first but boring after you know the trick. As a man come from future has no way to influence his own world, it is nothing special comparing to a man solely come from other place. Man comes from future may tell you something interesting, but man comes from mysterious place such as tropical rain forest can also tell you something marvelous. Time machine contributes less fun under parallel universes. As I said in previous post, the Japanese cartoon "Doraemon" has no concept relating to parallel universe. It creates many fun indeed! If you travel to the past, What you have done in the past induced direct consequence on the present world. It can lead to recursive causality that drives me laugh! You don't trust me? Let enjoy some episodes of "Doraemon"! You may find it in youtube.