Through the research of archaeologists, we can know that dinosaurs lived in the Triassic, Jurassic and Cretaceous periods. These three periods added up to a total of about 160 million years, which means that dinosaurs once ruled the earth for 160 million years. Hundreds of millions of years ago, dinosaurs stood at the top of the food chain with their powerful size and strength. If it hadn't been for the asteroid hitting the earth 65 million years ago, dinosaurs might have survived. Scientists speculate that 65 million years ago, there was An asteroid with a diameter of 10,000 meters hit the earth. After the impact, the environment on the earth changed dramatically. Many volcanoes began to erupt. After the volcanic eruptions, a large amount of carbon dioxide was produced. This carbon dioxide filled the air and caused great harm to life on earth. caused huge harm.
We know that the concentration of carbon dioxide is very high. A large amount of carbon dioxide permeating the air will block sunlight. Since sunlight cannot reach the surface of the earth for a long time, plants will not be able to produce photosynthesis. Over time, plants on the earth will After a large number of plants die, the oxygen content on the earth will decrease. Coupled with the greenhouse effect produced by carbon dioxide, the earth's temperature will become higher and higher. This is one of the reasons that led to the extinction of the dinosaurs. In addition to this reason , there are other reasons, such as the huge impact force causing forests to catch fire. Within tens of thousands of years after the asteroid hit the earth, the earth's environment has undergone tremendous changes. Because the dinosaurs could not adapt to such a harsh earth environment, they finally All become extinct.
Fortunately, humans were born after the demise of the dinosaurs. Scientists believe that humans evolved from apes. If the dinosaurs had not perished 65 million years ago, based on the dominance of the dinosaurs on the earth at that time, apes would have been impossible. Evolving into humans, as the saying goes, survival of the fittest and survival of the fittest. After the extinction of the dinosaurs, many new creatures were born on the earth. Among the many newly born creatures, humans are the most intelligent life. The birth of humans has added a lot of brilliance to the earth. , if humans had not appeared, the mysteries of the earth and the universe might never have been revealed.
How long can humans rule the earth
As the most intelligent life on earth, human beings have shouldered the responsibility of exploring the universe since their birth. Now we can know that there are many celestial bodies in the universe, such as stars, planets, comets, white dwarfs, neutron stars, black holes, etc., all of which It is a celestial body in the universe. In addition to these celestial bodies, there are many mysterious celestial bodies in the universe that we don’t know about. Although the size of human beings is far behind that of dinosaurs, human intelligence is the smartest among creatures on earth. , human beings have used their own wisdom to stand at the top of the earth's food chain. Human beings have been born for millions of years. So how long can humans rule the earth?
Judging from humanity's current technology, it is impossible for other creatures on the earth to threaten humans. Currently, the only threats to humans are asteroids, aliens and the earth's ecological environment. Let's first talk about the threat of asteroids to humans. If an asteroid hits the earth again in a short period of time, it may lead to the extinction of mankind. However, humans can now observe all movements of asteroids in the solar system through astronomical telescopes. No asteroid has yet been found flying towards the earth, and human beings Technology is constantly improving. With the advancement of human technology, humans will have ways to prevent asteroids from hitting the earth in the future. For example, they can use spacecrafts to hit asteroids and make asteroids deviate from their flight paths, or use nuclear weapons to blow up asteroids. These methods can eliminate the danger caused by asteroids hitting the earth.
At present, the biggest threat to human beings is aliens. As for whether aliens exist in the universe, this question has been explored since humans walked out of the earth. So far, humans have not found aliens in the universe. According to scientists’ definition of the origin of life, there should be many aliens in the universe. Scientists believe that if a planet is in the habitable zone of a star system and has water and air on it, Then the possibility of life being born on this planet is very high. There are countless planets in the universe, and many of them should be in the habitable zone of the star system. Why haven't humans discovered aliens yet?
Many people believe that it is because human technology is not strong enough. Although humans can currently observe the universe through astronomical telescopes, astronomical telescopes can only see the approximate positions of planets. If you want to know whether there is life on the planets, you still have to Only after humans have landed on planets in person do we know that currently humans cannot even fly out of the solar system, let alone land on other planets. If human technology develops to a certain level in the future, maybe we will be able to find aliens. Then Why are aliens said to be a greater threat to humans?
Because if alien technology is more powerful than human technology, then if aliens discover the earth and launch an attack on the earth, humans will not be able to resist it. I believe many people have read the novel "The Three-Body Problem". What the novel tells is that after the position of the earth was exposed, the Trisolaran civilization launched an attack on the earth. Because the technology of the Trisolaran civilization was very advanced, they quickly occupied the earth. So far, we have not discovered aliens. This is very difficult for humans. It may be good news, but what is coming will always come. What humans can do now is to work hard to develop their own technology to deal with the arrival of aliens.
In addition to the threat of asteroid impacts and aliens, the biggest threat is the earth's ecological environment. The dinosaurs that had ruled the earth for 160 million years were extinct because of the huge changes in the earth's environment. Now, now With the advancement of human science and technology, human damage to the earth's ecological environment has become more and more serious. The current global greenhouse effect is serious, and the earth's temperature is rising year by year. Scientists predict that in about 1,000 years, all the glaciers in the Antarctic and Arctic will melt. , by then, the sea level will be more than 60 meters above sea level, and many coastal cities will be submerged. This is the most dangerous thing for human survival.
If humans continue to destroy the earth's environment, it may be that in a few hundred years, the earth's ecological environment will no longer be suitable for human survival. By then, humans will have to look for new homes. Although many scientists have discovered many planets similar to the earth outside the solar system. Planets, but these planets are too far away from the earth. There is no way to fly there at the current flight speed of humans. In the solar system, only Mars is suitable for immigration, but Mars has no magnetic field and atmosphere, so if you want to immigrate to Mars, you still need to Transforming it. Transforming a planet is different from building a house. There are many factors to consider. It is basically impossible for humans to transform Mars with current human technology. Therefore, if humans want to develop for a long time, the best way is It is to protect the earth's environment so that human civilization can develop for a long time. In this regard, how long do you think humans can rule the earth?
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