If the earth loses its gravity, it will have its gravity, just like thousands of planets in Qian Qian in the universe. Scientists measured the acceleration of gravity on the surface at 9. Eight meters per second. Humans have become accustomed to the gravity of this blue cradle and turn a blind eye to it. Only from the high jump records refreshed again and again in the Olympic Games can we find that human beings are challenging the gravity of the earth. Imagine what the world would be like if human beings could save energy and the earth lost its charm of attracting 5 billion people. Natural logic is no longer that water flows downwards, the surging water sources of rivers, lakes and seas become water droplets scattered in the air, and aquatic animals and plants will become history. Everything is mixed together, and human beings need some time to exercise their balance and clean up the space of the earth. People's lives will also change greatly. Sleep in a fixed sleeping bag at night to avoid waking up in the morning to the territory of neighboring countries. Washing can also become complicated. In order to prevent the spread of sewage, it can only be carried out in a closed place. Traffic will face unprecedented reform, and the traffic policemen who are busy with vertical and horizontal three-dimensional traffic are happy. What the education industry really implements is open-air education. Although it is difficult for students to sit up straight in class, the burden reduction work has reached its limit. Great changes have taken place in people's working methods, and traditional pen handwriting will not be able to continue to be used. The storage of paper and books is very inconvenient, and computer storage has been widely used. The problem of garbage and resources will rise to the world crisis, because garbage is everywhere, it is not easy to concentrate, and the blasting of mines has encountered unprecedented problems. At the same time, the population problem has eased, and people make full use of three-dimensional space, making the earth less crowded. The climate of the earth has become unimaginable, raindrops will not fall like curtains, and snowflakes will not fall to the ground and spread silver blankets. Earthquakes have nothing to do with human life, but the combination of land volcanoes and underwater volcanoes poses a threat to people. The development of human civilization has been greatly deflected, and some classical subject knowledge has degenerated into garbage. The research of biological science has entered a new field and produced incredible achievements. But how will the ecological changes of the earth lead to the evolution of species? How does matter develop? This could be a nightmare. Maybe before humans dream this dream, they will be taken away and destroyed by other celestial bodies.