Is the birth of human beings in the universe accident or inevitable? Is human beings important to the universe?
To understand this question, you need to understand how people were born and whether this process is replicable.
Matter in the universe
The birth of human beings is not just starting from the birth of Archisaurus more than 2 million years ago, it starts from the birth of the earth.
So, let’s review the 4.6 billion years of historical trajectory from the earth to humans, and see if the emergence of humans is accidental or inevitable.
Solar system
Birth of Earth
0Solar world was born in A chaotic nebula . It should be noted that there is no clear answer to who is older and younger of Earth or the Sun.
Many people tend to think that is both formed from nebula at the same time. Some scientists also believe that the earth is likely to exist before the birth of the sun, and it was later captured by the sun.
In terms of composition, this hypothesis is indeed possible. Earth is a rock planet , but to put it bluntly, it is the large dust in the universe of . The formation of dust does not require stars.
star born in nebula
That is to say, as a star, its age starts at the moment it glows, but the earth is not a star, and its age can be calculated from its prototype . The most abundant gas in the
nebula is the gas , which is mainly hydrogen , but it also contains some other elements. These are that a star on was "sponsored" by a star on when the supernova exploded.
In addition, the nebula also contains dust and fragments of various rocks , which are the "body" of the victims of the super new star explosion.
The supernova explosion produces huge energy. It will not only blow up its own planets, but also affect other stars' celestial bodies.
The power of supernova explosion
Before the star shines, its mass already exists, and the rock dust forms the appearance of a rock star body under its gravity.
In this regard, we can find evidence from Jupiter . The main components of Jupiter are very close to the sun, and its size is larger than the remaining seven planets. It is hard not to doubt that it is an unsuccessful star.
In the early stages of the formation of the solar system, there were more than 8 planets inside , but there were only 8 planets that ended up sticking to it. For other planets, , they either left the solar system, were sucked into by the sun, or were wiped out in the collision with each other, such as the former neighbor of the Earth, Theioja .
If the initial momentum of the earth and the gravity of the sun did not reach equilibrium, then our earth today will not exist at all.
Theyia collided with the earth
Life was born
The Earth became a planet in the solar system, and could accept the energy from the sun. The Earth also passed through its immature early stages. faded away the heat on the surface, and water appeared on the surface .
Scientists have also argued about the origin of water. Some people think that water comes from aliens, but more scientists believe that water is owned by the earth itself.
Water water will exist in a special form in at high temperatures, which is a fourth state different from the solid, liquid and gas forms - supercritical state .
The early surface temperature of the earth exceeded 374℃. When water is under pressure from 22.1MPa inside the earth, it will exist in a supercritical state. After the earth cools down, the supercritical water of
and so on, the supercritical water of gradually returns to normal , becoming a liquid state that emerges from the inside of the crust, forming the initial ocean.
These waters also bring some elements in the crust of to the surface , which are the raw materials for forming the first life.
Although the surface of the earth has cooled down, its is still hot inside, which makes the earth full of energy at all times. The excess energy of will release in the form of earthquakes and volcanic eruptions .
The interior of the earth
The surface of the earth is covered with sea water, and there is a chemical reaction between various substances in the water . Near the seabed crater, due to constant hot substances coming out, the reaction here can be carried out continuously.
By chance, a substance , mainly carbon chain, was reflected at the mouth of the Hot Spring. It not only exists alone, but also "holds hands" to form a larger substance.
Slowly, the length of the carbon chain determines the degree of strength , and they will swallow each other to obtain more carbon chains.
Organic carbon chains
Some carbon chains choose to unite. They do not simply rely on their carbon chains together , but draw out an area where everyone stays inside to protect each other, making them look larger, but in fact there is a bunch of loose sand inside.
Gradually, it is impossible to tell whether these organic substances are whole or motley . They can no longer live without each other. Finally, about 3.8 billion years ago, and 3 organic compounds called Luka were born . It uses a layer of substance similar to a membrane to pack the organic substances, which is cell structure .
Starting from Luka, cell organisms began to flourish, and continued to evolve over the next 3 billion years, and countless forms were born.
early earth
landed on land
Although humans and other creatures are descendants of Luka, for more than 3 billion years, our ancestors were all who lived in the water.
Modern people live on land, so how did the earliest land creatures come from?
This also mentions the chord , the ancestor of our vertebrate, which was originally a soft bug on the seabed of , and belongs to the evolutionary branch of posterior oral animal .
However, in the process of evolution, in order to increase its toughness, a in the posterior animal thickened the dorsal wall of the intestine inside its body, and became a "column" in the body of , and finally evolved into a chord, giving birth to chordates.
Bioevolution branch
In the later evolution, notacres continuously strengthened , and they even absorbed calcium in seawater, making the notacre stronger. With the support of calcium, this notacre evolved into spine .
Since then, vertebrates have differentiated, and the pharyngeal gills that existed in the postoral period of evolved into jaw . As a result, jawed fish were born, and since then, the position of the Earth’s overlord has never left vertebrates again.
The evolution process of jawed fish is divided into four schools: Shield skin fish , radial fin fish, meat fin fish, and cartilage fish .
fish family
Cardiola fish chose to land during the Devonian period, and eventually evolved into all terrestrial vertebrate , , among which not only later mammals, but also later dinosaur .
Mammals did not have the advantage at the beginning, but the dinosaur family was extremely prosperous, spanning 160 million years from the late Triassic period to the Jurassic to the Cretaceous .
, and we mammals have always been the poor worm under dinosaurs' feet , and it was not until the mass extinction 66 million years ago that the mammals found a chance to counterattack.
meatfinfish evolution
Among this mammal, has an evolutionary branch called the primate , which looks like mouse , and is good at climbing trees. About 55 million years ago, the forests flourished towards the global warming of . They climbed up the tall canopy layer and occupied the arbitrary ecological niche. primates were officially born .
More than 2 million years ago, a primate decided to make a decision that violated his ancestors and walked down the tree.
primate ancestors
humans walk on the earth
About 250 years ago, Earth fell into an ice age , and most of the Eurasian continent was covered with ice and snow. The high pressure in the Eurasian region caused the African continent to fall into dryness. The forests in East Africa area disappeared on a large scale. Australopithecus living there had to go to the ground to survive.
In order to avoid natural enemies and to catch food, ancient apes learned to walk upright invisibly liberated the forelimbs, and the vacant forelimbs burst out with amazing evolutionary potential.
From this moment, a new animal group of was born , this is human.
Australian australis
We are very familiar with the stories after the story of Australopithecus
. There have been many kinds of people on earth, only HOMOUS HOMOUS 4 HOMOUS 9. All of our humans are descendants of HOMOUS.
From the birth of the earth to the birth of human beings, has gone through 4.6 billion years, , No link has happened or other things happened during this period , and the world will not be what it is today.
From this perspective, the birth of human beings was accidentally connected to form .
Walking upright
So, is the birth of human beings replicable? It can be copied, but it must be ensured that each ring is the same. The probability of successful copying of is equal to finding two identical leaves .
In other stellar systems , similar things may happen, but it is difficult to happen exactly the same thing. It can be seen that humans on earth have unique characteristics in the universe .
unique does not mean that humans are very important to the universe . When there were no humans, the universe was running all the time. Humans are just a kind of matter in the universe , and there is no difference from dust, celestial bodies, and gas.
The birth of all matter is inside the universe, and we can regard it as the arrangement and design of the universe.
The planets similar to the earth in the universe
The universe will not change because of humans, and the meaning of the universe does not depend on humans. On the contrary, the meaning of humans needs to be carried by the universe.
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