Throughout the human history, there were a lot of marvelous inventions pushed our civilization into a high level. Among them, some were beneficial for human, such as paper and electricity,but a few of them created big crises and troubles for people all around the wrold, such as guns. Today, I want to talk smething about one of the great inventions which really helped people for thousands of years. It's paper. At the very beginning of human history, people gained knowledge from what their parents told them, generation to genetration, this way made the big events happened a long time ago slowly became myths. Until today, we are still confused about our own myths. All of us might have experienced an interesting thing that when we told our friends something, then you would heard another version about this thing from other people a few days later. So, if we record an event on a certain object, less mistakes will be made about it. Even after thousands of years, we can still read it. So, can we say paper is one of the greatest invention in the history?