If humans arrive and live in the new earth, can they really survive on it?

Millions of years ago, human ancestors stood out from the biological world of the earth and walked to the top of the food chain with wisdom. Humans have traveled all over the world and have the same status as dinosaurs. We have also established a splendid human civilization, and dinosaurs are not as good as us. For human beings, the earth is our home, although the development of science allows us to see the boundless universe. But this is not our home. Our home is the earth.

I don't know if you have ever thought about a question, can we live on the earth forever? I believe everyone will be a little confused. After all, this is a grand question, which concerns the future destiny of mankind. Scientists believe that human beings will not live on the earth forever. If our scientific and technological strength is strong enough, we can realize space migration. Mars is the goal of scientists. It is not suitable for human life now, but we can find a way to transform it.

How long can human beings live on the earth without accidents? In other words, how long can the earth allow human beings to live? The answer is 5 billion years. Everything in the world has birth and death, which is the iron law in the universe, and the earth can't escape. In a few years, it will come to the end of its life. In fact, we should pay more attention to the sun than the earth. As the only star in the solar system, it is the protagonist.

The sun is also linked to the fate of mankind. Without the sun, there would be no light on the earth. Without the sun, creatures that depend on it will die. It gives us light and heat, the hydrogen inside the sun is burning, and the nuclear fusion reaction has not stopped for a moment. The mass of the sun is equivalent to 330,000 earths. Hydrogen alone accounts for three quarters, the rest is mainly helium, and finally elements such as carbon and iron.

According to the classification of stars, the sun belongs to yellow dwarfs, and the life span of such celestial bodies is about 65.438+0 billion years. In another 5 billion years, the sun will enter old age, when it will become a red giant. Hydrogen is basically used up, replaced by helium. At this time, the sun will become a threat to the earth.

Because of the "helium flash", the hydrogen in the sun is really exhausted, but there are still many helium elements that can be fused, but the conditions are harsh. Helium flash is a transient nuclear fusion, which is mainly caused by helium. The energy released in a short time will turn the planet in the livable zone into purgatory, and no life can survive.

So after 5 billion years, we will leave the earth, but this time may be shortened. According to Hawking, human beings will leave the earth within 200 years. This prediction is supported by some scientists. What is Hawking's reason for saying this? Hawking's ideas actually coincide with those of other scientists. With the development of human society, we consume more and more earth resources, and the earth is already in an overloaded state.

The greenhouse effect, the melting of polar glaciers and the thawing of frozen soil in Siberia are all signals sent by the earth, and some scientists even think that this is a precursor to the sixth extinction. Comparing the time of previous mass extinctions, we can find that the interval time is between 60 million years and 654.38+0.4 billion years. So in a very short time, we are already in the sixth mass extinction.

However, scientists have not given a clear answer, and it is still speculation. Now there are species disappearing every day on the earth. Since human beings entered the modern society, the speed of biological extinction has accelerated a lot. The ecological environment has also undergone drastic changes, all of which indicate that the earth's environment is in a turbulent stage. Frequent geological activities and the readiness of Huangshi volcano seem to imply that the future of mankind will not be better. Hawking let mankind leave the earth within 200 years, perhaps because he saw the future of mankind.