Far away in the depths of the universe, there is a mysterious and gripping history. At that time, the universe was chaotic, there was no light, no darkness, only a boundless nothingness. However, in this nothingness, the seeds of the universe quietly germinated, and this was the moment when scientists called "big **".
About 20 billion years ago, the universe began in its original form as a chaotic primitive atom. This atom is so large that we can't describe its enormity in any words. However, this atom has extreme density and temperature, causing the particles inside it to collide and squeeze constantly, creating a tremendous amount of pressure.
Under this tremendous pressure, a strange phenomenon began to occur in the universe - the phenomenon of redshift. To put it simply, the light rays in the universe start to move towards the red end, because the matter in the universe is moving away from each other, causing the wavelength of the light to become longer. This phenomenon tells us that the universe is constantly expanding and expanding.
Over time, the universe has gradually become less chaotic. On the basis of the primitive atom, the universe gradually formed various material particles, such as electrons, protons, neutrons, etc. These particles come together under the influence of gravity to form the various celestial bodies we see today.
In this process, positive matter and antimatter are also produced one after another. Positive matter is the substance that we come into contact with in our daily life, such as tables, chairs, air, etc. Whereas, antimatter has opposite charges and magnetism, and if positive matter and antimatter meet, they cancel each other out and produce energy. However, in the early days of the universe's formation, the amount of positive matter and antimatter was equal, which is why the universe we see today is mostly composed of positive matter.
So, how did this process come about?The answer lies in that mysterious origin of the universe – what we often call the singularity. At the singularity, all matter and energy are concentrated at an infinitesimal point, and this point is the starting point of the big **. When the pressure inside the singularity reaches its limit, it triggers a large **, which gives birth to our universe.
In the process of the birth of the universe, it was accompanied by many other physical phenomena. For example, black holes, dark matter, and dark energy in the universe are all very important research objects in cosmology. The existence of these phenomena not only gives us a deeper understanding of the universe, but also makes us think more about the mysteries of the natural world.
There are many other amazing and intriguing phenomena in the process of the birth of the universe. Among them, the black hole in the universe is an elusive existence. A black hole is a special object predicted by Albert Einstein's general theory of relativity and found by astronomers with telescopes. It has an extremely strong gravitational pull, and not even light can escape its attraction. Therefore, the interior of the black hole is unknown, and we cannot observe it directly. However, with the continuous development of science and technology, we are gradually unraveling the mystery of black holes. A recent study has shown that we can understand the properties of black holes by looking at their effects on the surrounding environment. Using powerful telescopes, scientists observed gas and dust near the black hole. They found that when matter is sucked into a black hole, a rotating disk-like structure called an accretion disk is formed. This disk-like structure emits high-energy X-rays or gamma rays, which can be captured by telescopes on Earth. By analyzing the data on this radiation, scientists can deduce the properties and location of the black hole. 
In addition to black holes, there are many other mysterious phenomena in the universe. For example, dark matter and dark energy are very important concepts in cosmology, but their nature and role remain a mystery. Scientists are conducting various experiments and observations to find clues to these mysterious substances. In addition, the large-scale structure of the universe is also one of the amazing phenomena. For example, how huge celestial structures such as galaxy clusters and superclusters are formed, as well as their dynamics and evolutionary processes, are questions that scientists continue to explore and study. 
In conclusion, the birth and evolution of the universe is a process full of unknowns and mysteries. Through the continuous exploration and study of this process, we can have a deeper understanding of the universe in which we live, and we can also have a deeper understanding of the mysteries of the natural world. Although we may never be able to witness this process with our own eyes, through the Xi and study of science, we can continue to get closer to this truth and constantly unravel the mystery of the birth of the universe. Three minutes to talk about popular science