Get off Earth as fast as you can

Get off Earth as fast as you can

How many times has Hawking urged humans to leave Earth as soon as possible? Had he discovered some secret?

Human science and technology can be repeated leap in hundreds of years, cannot leave the great scientists of the pay, such as we are familiar with Newton, Einstein and so on, almost every era has several great scientist was born, in the modern, nature also have such a great scientist, such as "king of the universe" hawking is familiar to us.

Speaking of Hawking, I believe a lot of people know him, probably a lot of people know Hawking from his published, in the world is very widespread "A Brief History of Time", this is Hawking very famous science books. Hawking did a lot to popularize science, especially to get people interested in the exploration of the universe.

We all know that science is a very dull thing, those who understand the scientific theory, to understand the scientific language tends to make a lot of people lost interest in science, but there is a very humor, hawking ordinary language for science, especially about the universe of science, make a lot of people to the universe science no longer feel the heads.

This is very difficult, because it is often easy to describe scientific things in abstruse and complex language, but it is very difficult to use ordinary language, so that the public can understand, understand, and Hawking did it. So he is called the "King of the universe".

In fact, Hawking can be called the great scientist of modern times, not because of his publication of "A Brief History of Time", but mainly because of his great contribution to the exploration of the universe. In particular, considerable scientific achievements have been made in the exploration of the unification of quantum mechanics and relativity, and Hawking's theory of Hawking radiation has made people know more about black holes.

A lot of people know Hawking, another important reason is that Hawking has repeatedly issued some predictions, Hawking's predictions are basically about the future of human concerns, in Hawking's opinion, human beings should leave the Earth as soon as possible, otherwise it will be dangerous. Why has Hawking repeatedly urged humanity to leave Earth as soon as possible? Had he discovered some secret?

Some people may think that Hawking is too pessimistic, the Earth is the home of mankind for millions of years, should be able to survive for a long time, why leave the Earth? The real threat to Earth and human ecology, in the view of many, would be the expansion of the sun into a red giant at the end of its life, billions of years from now.

At that time, as the sun's helium flashes, its rapidly expanding volume would engulf the Earth. Only then will man really need to leave the Earth. Before the sun expands, man can live on the earth without any other worries. Is it true?

In fact, Hawking, as a famous cosmologist, knows far more about the dangers of the universe than we do. The expansion of the sun into the red giant, which could threaten the survival of Earth and humans, is negligible because it is too far away for us. Whether humans will last billions of years is unknown, so we don't have to think that far ahead.

Hawking said that human beings should leave the Earth as soon as possible, and the "as soon as possible" means within hundreds of years. Hundreds of years is a very short time for the universe, for a civilization, the blink of an eye will pass. Why does Hawking think there will be a major crisis in hundreds of years' time? In fact, this problem should be explained from several aspects.

The first is from the risk of an asteroid impact, believes that many amateur astronomers know that happened in the shoemaker-levy 9 comet Jupiter, the impact that scientists actually witnessed the huge asteroid impact power, if such a comet hit the earth, the earth will be divided, human civilization will end.

And the number of asteroids in the solar system is so large that we can't count them. And asteroid impacts are a regular occurrence in the solar system, look at the many large craters on Mars, look at the countless craters on the moon around us. Earth has been very lucky to avoid a large asteroid impact, mainly because of the protection of the giant Jupiter ahead.

But luck will not be with the earth forever, maybe one day there will be a huge asteroid is facing the earth, if at that time, we do not have the ability to intercept the asteroid, or the ability to leave the Earth, waiting for human will be the same fate as ten thousand years ago dinosaurs.

The second is that the Earth's ecology is deteriorating far more than we think, and a big part of the reason Hawking is so anxious to warn humans to leave Earth as soon as possible is that he sees the Earth's ecology deteriorating faster and faster. Maybe we now feel that the ecology of the earth is that the global temperature is rising and getting hotter and hotter.

But when the global warming trend continues, once more than a certain critical point, the earth's ecosystem will be out of control, then the global ice and snow melt, sea level rise 60 meters, frozen tens of millions of years of permafrost melts, the different age of various bacteria and virus recovery will brings the huge disaster to the earth and human beings.

At the current rate of ecological deterioration on Earth, when these disasters occur, it may be within a few hundred years. At that time, the only way for human beings to survive is to leave the Earth and choose to live on other planets.

Third, the universe is the future of human beings. As a "fifth in the universe", Hawking naturally knows that with the rapid development of science and technology, human beings will face the serious problem of resource depletion in the future, and only space resources can solve this problem. In addition, there are countless planets suitable for human survival in the universe. Only into the universe can the development of human civilization usher in a new era and let human beings go out everywhere.

If the human race is confined to the Earth and the small solar system, it may be ended if it encounters a great disaster in the future, such as the invasion of an alien civilization. But if human beings spread throughout the galaxy, then human civilization would not end with the end of human beings in the solar system, and human civilization would last forever.

Therefore, Hawking's repeated urging for humans to leave the Earth as soon as possible is not an unreasonable blind prediction, but a well-grounded warning. Hawking's continuous popularization of the knowledge of the universe to mankind is also for the purpose of making mankind interested in the exploration and research of the universe, so as to accelerate the pace of human space exploration and research, so that human beings can realize the scientific and technological leap faster, so as to enter the interstellar era.