In 1980s, topics about aliens were really hot. We could see different kinds of alliens in different shapes in many movies. They visited this blue planet by taking plate shpaed aircrafts. Some of them were kind, but others were rude and evil. Even some people in different places aroud the world said that they have seen alliens and been invited to visit the aircarfts. Everything around us became unearthly due to the thoughts about alliens. I once thought that I might be one of the alliens with many amazing powers. Then as we never saw any alliens, the passion about searching for extraterrestrial civilization slowly faded. But once the seed of curiosity was planted in our heart, our world has been changed. We hope aliens can help us solve all the crises which threaten us and punish the evildoers. So, when we feel tired about the world and life, we hope to be helped by an unknown force like aliens. At that moment, we believe aliens really exist. When we feel happy about the world, we think that we are the king of the world and we are more powerful than anything. However, everything can be changed. Many years later, when I saw the back of one-dollar bill, I was suprised to find that there was a pyramid with one eye on the top. I stared at the eye, the eye also stared at me. Maybe someone have actually found something.