The development of human beings has led to the development of machines. As early as ancient times, Archimedes had made many machines for Syracuse to resist the invasion of Rome. Indeed, the role of machinery in human beings is unparalleled, and human life cannot be separated from machinery. Simple machinery-pulley can play a labor-saving role and is used in life and production.

The invention of the steam engine marked the beginning of the first scientific and technological revolution, and the gross domestic product of mankind was constantly refreshed. The invention of the generator marks the beginning of the second scientific and technological revolution, and the widespread use of electricity has brought mankind into a new era. The invention of electronic computer marks the beginning of the third scientific and technological revolution, and the use of electronic computer has brought mankind into the information age. With these scientific and technological revolutions, human development has advanced by leaps and bounds, and unprecedented machines have appeared one after another. The ever-increasing population and the deterioration of the earth's environment urge mankind to look to the universe and find a new home. The Soviet Union launched the first man-made satellite into space, and the Americans landed on the moon for the first time ... These alone do not indicate that mankind has moved towards this boundless universe. At present, human spacecraft can't fly out of the solar system at most. Sadly, all kinds of astronomical data show that there is no planet in the solar system that can be used as a new home for mankind. Even though the spacecraft can take us out of the solar system, the speed limit has made us old enough to get out of the Milky Way. It can be seen that the beginning of the fourth scientific and technological revolution is marked by the invention of a new machine, the light speed engine, and it also truly marks the March of mankind into the universe. With the light speed engine, it is only a short journey from the earth to the moon, to Mars, to Pluto and even to the Milky Way. It is conceivable that the light speed engine can quickly take humans to various planets. We set up relay stations on various planets, and space roaming has become a common occurrence ... I believe that after several years of exploration, we will definitely find the first and second ... the nth earth in mystery of the universe.

Due to too many limitations of human beings, it is impossible to completely take human beings to the universe by the light speed engine alone. Human life is inseparable from oxygen and fresh water ... Imagine how much oxygen and fresh water are needed to maintain a planetary transit station during the space roaming. The earth is already short of water resources. How many natural resources do you need to make oxygen artificially? It takes 4.8 years for the speed of light to reach the nearest proxima centauri. Humans have to go further. How can the life span of 70-80 years be satisfied? Raising the human limit is another important condition for entering the universe, which is the task of the fifth scientific and technological revolution-inventing the mechanical human body. As long as human beings bring their "soul" into a lasting body, then people can run faster and fly higher without eating, drinking or taking oxygen ... They have thousands of years of life and strong muscles. ...

With these two, I believe that this huge universe can also be conquered by human beings.

As mankind enters a new era, the imagination of all kinds of new machinery will be endless. May machinery benefit mankind forever.