The earth is the homeland where mankind has lived for millions of years, and it is also the only habitable celestial body in the known universe. With the continuous advancement of human science and technology, we have a wealth of knowledge about the earth and some knowledge of the solar system outside the earth.
Through constant cognition, we have discovered that the earth cannot be the eternal home of mankind. Therefore, scientists continue to explore the universe and explore Mars in order to find a new way out and find a new home for mankind. When the earth cannot adapt to human existence, you can live on Mars or live on a better planet outside the department.
Someone once said that the real disaster that can completely destroy the earth comes from the sun. As a star, the sun also has a lifespan. After another 5 billion years, it will enter the red giant stage and will continue to swallow the earth. At that time the earth will completely become a purgatory planet, unable to survive suitable for survival.
Others believe that the sun will not give the earth 5 billion years at all, and at most another 1 billion years, as the sun’s temperature rises, the earth will not be suitable for survival. We have no objection to the above two cognitions. It is true that the ultimate destruction of the earth will be caused by the sun, but can human beings wait until that time?
As a planet, the earth’s bearing capacity is very powerful, unless a huge cosmic catastrophe can destroy it. But life is very fragile. Any kind of great ecological changes may bring about the mass extinction of living things, thus ending an era of life. 65 million years ago, the dinosaurs that had dominated the earth for 160 million years went to extinction because of an asteroid impact.
Therefore, we cannot expect the sun to give mankind another 1 billion or 5 billion years. In such a long period of time, the earth’s ecology will undergo countless changes. Each change is a test for us. If the test cannot be passed. , Then human civilization will become history.
Then, in the earth’s ecosystem, what has a greater impact on us? Here we have to mention the magnetic field. I believe that my friends all know that the earth has a very powerful magnetic field, which extends through the earth for thousands of kilometers, effectively protecting the earth’s orbit and the ecological environment of the earth itself.
We must know that the universe is not a beautiful environment, on the contrary, it is very harsh. Solar wind and cosmic radiation can have a greater impact on the earth’s ecology. Without the protection of the magnetic field, the atmosphere will continue to lose, and the liquid water on the surface will continue to evaporate. Finally, the entire earth becomes a desolate planet like Mars, and life cannot survive.
Therefore, whether the earth’s magnetic field is stable is very important to life on earth, especially for today’s human science and technology, once the magnetic field fluctuates greatly, the impact will be greater. Can the earth’s magnetic field remain stable all the time? The answer is no. According to the research of scientists, the earth’s magnetic field will experience a major reversal of the magnetic field every once in a while.
It is roughly estimated that in the past 76 million years, the earth has experienced 171 magnetic pole inversions, and the most recent one occurred 700,000 years ago. From the perspective of the theoretical cycle, the next magnetic field reversal seems to be not far from us. If the earth’s magnetic field is to reverse, there must be some signs in advance. So have scientists discovered the abnormal fluctuations in the magnetic field?
According to research data released by scientists from the National Aeronautics and Space Administration (NASA), a strange “dent” was found in the earth’s magnetic field. This strange “dent” is moving slowly westward, passing through South America and South America. Atlantic.
In addition to this magnetic field “dent”, the more serious situation is that scientists have seen a major change called the “South Atlantic Magnetic Anomaly Area (SAA)”. Scientists have discovered that the anomalous area is gradually moving westward. NASA’s report shows that the area has split into two lobes, indicating that the Earth’s magnetic field has “fractured”.
These magnetic field anomalies are not good news for us. Their appearance may be a precursor to the reversal of the magnetic field. So why does the earth have a magnetic field reversal? For this, scientists do not yet have a definite answer. The general view is that the operation of the core of the earth may have changed.
We must know that the origin of magnetism is closely related to the center of the earth, and it is the movement of the center of the earth that generates the magnetic field. And the movement of the center of the earth is not fixed, but is periodic. If the dynamic system of the center of the earth changes, it will affect the change of the earth’s magnetic field, and the magnetic field will be reversed.
No matter why the earth’s magnetic field reverses, once it happens, the impact on the earth is very obvious, especially the impact on human beings.
The earth’s magnetic field is the “protective umbrella” of human beings. If there is a break, a “space pit” will be formed above the earth, and the radiation from the sun will drive in directly, posing a great threat to the surface of the earth, especially the impact on life. Bigger. We must know that the resistance of life on earth to solar radiation itself is very weak.
Astronauts put on spacesuits in space and stay in the spacecraft can not completely block the effects of solar radiation. The space crater created by the magnetic field rupture first affects a large number of satellites in the earth’s orbit. You know, the reason why satellites can safely move in the earth’s orbit is precisely because of the protection of the magnetic field. If the protection of the magnetic field is lost, the satellite will be paralyzed.
Without satellites, many electronic devices that rely on satellites will naturally become a pile of scrap iron that cannot be used. And as the abnormal magnetic field intensifies, solar radiation will have a devastating effect on electrical equipment and electronic equipment on the ground. We must know that the mainstream of human technology is all kinds of electronic devices, and solar radiation happens to be their nemesis.
Therefore, the magnetic field reversal is fatal to technological civilization, and it will set the human age of science and technology back many years. In addition, many birds and animals also need magnetic navigation for their migration. If the magnetic field is reversed, these animals will also face huge disasters.
So can human beings survive the reversal of the magnetic field? The answer is yes. We must know that the closest magnetic field reversal occurred 700,000 years ago. At that time, the ancestors of human beings were born more than 1.3 million years ago. With the strength of human ancestors, all can survive the reversal of the magnetic field. As a human being in the age of science and technology, there is no problem, but human beings need to face huge losses.