Since the establishment of civilization, humans have never stopped exploring the nature of life. But just like other ultimate questions, no one can give the exact answer to this question so far.
Even though manyScientists in the field can use their own perspectives to explain the origin of life, but these explanations are not as invulnerable as the theory of relativity and evolution, which means that they all have more or less inconsistent "holes".
In fact, in the process of studying the origin of life, there is a problem that is of great interest to almost all researchers, and that is the mystery of the extinction of dinosaurs.
Why the mystery of the extinction of dinosaurs and the study of life Are the phenomena involved? In fact, from a higher perspective, life is not only defined by carbon-based life on the earth, it may also exist on a larger or smaller scale in the universe.
Of course, the size here is not the big and small as we understand in life, but the difference or gap in the more basic physical structure.
For example, many previous Scientists believe in the existence of "neutron people". These peculiar lives live on neutron stars that are small in size but extremely dense. Due to the extremely high pressure and temperature on neutron stars, this kind of life has powerful evolutionary and adaptive capabilities. It may only take a few months from birth to the establishment of a civilization on Earth.
Correspondingly, their life span is also extremely short. From birth to death may seem to be a momentary matter for humans.
At the same time, Many scientists believe that in the structure of dark matter and dark energy that humans cannot observe, there may be a life that subverts human cognition, and they may have an unimaginable huge size.
It is precisely because of the possibility of life on these scales that human beings cannot define life from a certain angle, and cannot study life in its entirety.
So in the foreseeable future,Human research and definition of life are concentrated in the solar system, so it is extremely meaningful to study the life that has existed in the history of the earth.
At present, after studying the faults of the earth, geologists have come to a conclusion: So far, the earth has experienced 21 "boom" periods of life of different scales. Correspondingly, 21 times of prosperity means 20 times of mass extinction.
After further research, scientists have proposed In fact, life on Earth is in constant rebirth, because an extinction event occurs almost every 30-60 million years. From this perspective, the extinction of dinosaurs may not be accidental, but an inevitable event in the entire cycle.
Of course, only through the research and analysis of faults, it is impossible to see the full picture of the dinosaur extinction event. In recent decades, scientists have discovered a large amount of metal "iridium" on the surface of the earth. This situation is very strange.
According to planetary evolution In theory, when the earth first formed, it was actually a fireball full of hot lava. In this case, the heavy metal "iridium" would definitely sink under the lava, and it would not be possible to stay on the surface.
Just like throwing a piece of iron into the water, it will inevitably sink to the bottom. So where does the large amount of "iridium" on the surface of the earth come from?
With the study of the distribution of comets, asteroids, and "iridium", scientists believe that these "iridium" on the surface are brought to the earth by comets and asteroids over a long period of time.
In combination with thisAfter this point, scientists saw the cause of 20 mass extinctions, including dinosaurs: every 30-60 million years, the asteroids outside the solar system will start to "crazy", at this time they have a very high probability of leaving The original orbit entered the solar system and eventually hit the earth.
This kind of impact alone will of course not exterminate a large number of organisms. What really wipes out most of the organisms is the one caused by the impact. A series of chain reactions, such as global temperature changes, volcanic eruptions, major earthquakes, and tsunamis, etc. These disasters will continue to occur for a long time, and eventually make most living things withdraw from the stage of history.
So why are the outer asteroids "crazy" every once in a while? Is it an arrangement of unknown forces? The answer is of course no. Scientists believe that the anomaly of asteroids is mainly related to the motion of the solar system itself.
We all know , The solar system is also in constant motion. It revolves around the center of the Milky Way at an average speed of 250 kilometers per second, and some areas of the Milky Way are very dense.
Every few thousand years when the solar system moves to a dense area, the asteroids outside the solar system will be disturbed by the disturbance of a large number of celestial bodies, thereby increasing the probability of them hitting the earth, and this is the "cycle of the mass extinction" Sex".
It is worth mentioning However, because the earth gave birth to intelligent life like humans, and mankind has developed industries that have severely damaged the earth, this makes the future destiny of mankind and the earth full of uncertainty.Sex.
The famous physicist Hawking once made a prediction: According to the current development speed and development of mankind, the earth will begin to collapse in 2600 because of overwhelming burden, and then there will be a global disaster. Mankind will face the same fate as dinosaurs, and whether mankind can survive this upheaval is still unknown.
Of course, although many scientists believe that there is a certain periodicity in life on earth, there are still Many scientists do not recognize this periodicity. I hope that with the continuous advancement of science and technology, mankind can truly understand the nature of life and whether there are periodic problems in life on earth.