the string theory In my opinion, the idea that particles are the essence of the world is mistaken. Most people who have no interests in physics still think the whole world is made up by “atoms”. For us, whose major is physics, knowing the most newly theoretical achievements, cannot have failed to notice a theory called “string”. When I stand by a willow, watching its leaves move in respond to a gust of wind, I consider it as a lot of strings have gone mad, but with an unique rule, the rule of nature. I have shared my opinion to others. Sure enough, they agree with me, even some of them had changed their minds, since the theory adapted to facts in more ways than one. It has been estimated that most of physicists would accept it. However, it is by no means considered to be a certain truth. Physics is like a room packed with beautiful bubbles and balls. Before you touch one of them, you don’t know whether it will last or not.