Is there only life on Earth Is there life beyond Earth?

Personally, I think that the universe is so big that there must be planets with living things, but we haven't discovered it yet.

Besides, we all talk about living things that need water, etc., but is there a kind of organism that doesn't need water at all, for example, carbon dioxide?

So, there must be ...

There may also be living beings and even aliens in the universe, which humans are trying to explore, but have not yet been discovered.

At present, no extraterrestrial creatures have been discovered, but the universe is vast, and many people cannot accept that there is only life on the earth, and human beings have always believed that extraterrestrial creatures will be discovered in the future.

The common concept of human beings is that what they do not know, they think does not exist or is impossible.

In fact, just as the same people are small compared to the earth, the earth is relative to the entire space of the universe, and even ants are inferior to the earth. Ants can never get to the other side of the world, and they never know if there are ants on the other side.

Although exploration has been always, human cognition and technology are still quite limited, and humans have only been to the moon outside of Earth. If you can't do interstellar travel yourself, why do you think that other galaxies and other lives can't do it?

It is said that there are already alien corpses in the United States.

The form of life is not limited to the form of our earth.

Or. There are other planetary organisms that exist in other metabolic ways, and all of this does not require water, oxygen, ......Maybe it's other circulating substance ......

I don't think so, it's still being debated. I'm inclined to biological aliens.

Aliens also have it, inevitably.

Beyond Earth, is there any life on other planets?

That's for sure. To quote a quote from the movie, "Isn't it a waste of space to have only human beings in the universe?" ”

Evidence:1. Carl Sagan, a famous astronomer at Cornell University in the United States, once pointed out that there are almost 200 billion stars in the entire Milky Way, and a considerable number of these stars have planets.

Of these planets, which are close to Earth's environment, it is estimated that there may be as many as a million. Since life can arise and evolve on Earth, it is possible that life will also arise and evolve on these planets, and develop intelligent life. And some of them must be more advanced through the current human civilization.

Therefore, these astronomers believe that the emergence of intelligent life on planets other than Earth is entirely possible.

2。The most recent evidence is that our Earth is located in the solar system.

Washington, 26 Apronya -- Scientists from NASA today published a study saying that an in-depth study of meteorites from Mars has shown that life did once exist on Mars.

American scientists have found a chain-like molecule on a meteorite from Mars, speculating that it is left over from Martian organisms. Friedman, a scientist at NASA's Amers Research Center, said they further analyzed the chain-like compound on the meteorite and confirmed that it came from a living organism.

Is there any extraterrestrial life in the universe?

Is there or how many celestial bodies like Earth are there in the universe. The organic molecules on Earth do not fly from outside the sky, but they are possessed by themselves, and substances such as water and oxygen, which are necessary for the existence of life, are also abundant in the embryo of the Earth. What is important, then, is the external conditions that cause the evolution of these organic matter, that is, the light and heat conditions from the sun, which are the external conditions that enable the evolution of the earth's organic matter into living matter.

In other words, because the earth has the two conditions of organic matter and solar light and heat, it also has the necessary conditions for the existence of life. In this way, we just need to explore whether there are planets and star systems in the universe like the Earth-Sun. According to research, there are about 1% of stars of the same type as the Sun in the Milky Way, and at least 10% of them have planets, that is, 100 million stars like the Sun have planets.

So among these 100 million planets, are there any planets that are completely consistent with the internal and external conditions of the Earth? In fact, there are countless galaxies like the Milky Way in the entire universe. According to the theory of probability, we can think that there must be celestial bodies in the universe that are the same or similar to the earth in addition to the earth, that is, there must be living planets like the earth in the universe, but we have not discovered each other.

The interior of the earth is an underground biosphere, also known as the dark biosphere, so named because they live underground for a long time, are not exposed to sunlight, and may be anaerobic organisms.

The creatures in the interior of the earth only live a few hundred meters inside the earth, and have not reached the depths of the earth's core, and the existence of the geocentric people is only at the stage of speculation, and there is no sufficient evidence to prove it. It has also been speculated that if the Centroid existed, perhaps they predated the emergence of human civilization.

The temperature of the primitive earth is very high, the geology is very unstable, there are ** and volcanic eruptions all the time, lightning and thunder in the sky. The composition of the original atmosphere was very different from today, similar to that of volcanic gas. The moisture in it turns into rain when it is cold, and evaporates when it encounters high temperatures.

Water and ammonia in the air may form amino acids, nucleotides, and other basic organic substances that constitute life under the action of lightning. Later, when the earth cooled down, water pooled to the ground to form primordial oceans, and organic matter dissolved in primordial oceans.

Organic matter interacts with each other to form chemical reactions, amino acids are condensed to form proteins, and nucleotides are formed into DNA or RNA, DNA and RNA can replicate themselves, and even use amino acids to form proteins. Over a long period of time, in one accident after another, life was born.

However, this structure of life is simpler than that of viruses (viruses are composed of DNA or RNA and proteins wrapped around the outside, and have no cellular structure), but after a long period of evolution, life has become more and more complex, from no cells to single cells, and then to multiple cells, and the more they evolve, the more complex they become, and finally the form of today.

As for the specific time.

We can only extrapolate from some rocks or ruins.

It is estimated that it is more than 4 billion years old.

When the Earth was formed, during violent geological movements, methane, water vapor and other gases were reflected and released due to the gravitational pull of the Earth, rotation and revolution. Firmly grasped a part of the (primitive atmosphere).The environment was extreme - volcanic.

Provides temperature - energy), ultraviolet intensity (promotes variation), and lightning crossover (promotes synthesis).At the same time there are a large number of amino acids (the material condition of life).Amino acids do not need to be combined under extreme conditions (chemically conditional, of course).

A very small fraction of them accidentally form primitive RNAs with rudimentary life characteristics(Now there are experiments that have done it; A glass sphere is filled with methane and other gases (simulating the original atmosphere) and a large amount of amino acids are added in an environment of continuous discharge. Synthetic raw RNA!!

Raw RNA can combine amino acids to form complex RNAOver the long years, RNA - DNA - active proteins (rudimentary life) - even longer years - unicellular algae (real life) - blink of an eye - humans appeared (evolutionary processes omitted in between).

Because the earth has a natural environment that is different from other planets, there are suitable conditions for the survival of organisms.

This is the result of the landalization of the natural performance hall. The earth has a stable cosmic environment suitable for the existence of life, water, atmosphere, and evolution, and in the process of evolutionary collapse, proteins are formed first, and then simple life-like organisms with cellless structures are formed, and then single-celled organisms are formed. The constant evolution is that the earth is now rich in life forms, and it will continue to develop.

However, many of the current human activities seriously threaten biodiversity.

I thought that countless particles of matter interact with each other, and there are various modes of interaction. (Lao Tzu said that one life is two, two is three, and three is everything.) )

And among them, there must be a pattern, the orderly movement of material particles, and this mode of motion can appear in cycles! (This is the most essential nature of the bridge we call "life.") Because this pattern of material movement can be spontaneously reproduced, it can be developed, complicated, and even developed in different directions on this basis.

So it evolved to the present, and a rich and colorful biological world has been formed.

PS: It's not uncommon for loops of movement patterns to appear, and there are similar situations in various fields. )

But why are only living creatures? That's because the mode of action of other particles of matter cannot reproduce their own motion, so although it happens countless times in nature, it is not accumulated at all, and it will always remain in its original state.

In fact, the movement mode of matter particles that developed into living beings was not much different from other material particle motion modes in the beginning. It's just that it has the characteristics of retaining itself and improving itself, so that its movement mode can continue to be complex and enriched, and after an extremely long time, it finally shows a different state from the middle of the shed.

In this sense, life is about inheritance and development. Broadly speaking, everything that can be inherited and developed is life. And life on our planet is only the only type of manifestation we see.

In the vast universe, there may be many life forms that are fundamentally different from ours based on chemistry.

As for many of the current conclusions, they are hindsight, just stating some facts, and the explanation of the matter itself has no meaning.

In ancient times, there was a lot of water on the earth, and the atmospheric content was mainly methane, ammonia, and hydrogen.

Water vapor, these gases produce chemical reactions when they encounter lightning, producing the most basic substances of life--- amino acids, and life is born, and later due to evolution, from aquatic to terrestrial, from low to high, until today.

Take the example of the evolution of life on Earth:

One. It is believed that when an alien object hits the Earth, the organic molecules on that body are born to the Earth. The process of organic matter production on this celestial body is roughly the same as the following two mechanisms.

Second, the oxygen, nitrogen, hydrogen, carbon and other elements on the earth form proteins under the action of the sun's ultraviolet rays and thunderstorms; It is also a coincidence that the earth is at the right distance from the sun, so there is life. Life then evolves further due to the constraints of the environment. And then after n billion years of evolution, humans came into being.

Billions of years ago, Earth's weather contained much less oxygen than it does now, and the mushrooms produced during volcanic eruptions were about 200 degrees Celsius warmer than they are today. This condition is very conducive to the synthesis of organic polymers and amino acids from a variety of substances in the mushroom cloud. These substances fall to the ground, and after years of interaction, they can synthesize RNA molecules that have the ability to replicate themselves, making the emergence of primitive cells possible.

What is the concept of things.

A living thing is a collection of objects whose elements include: a living object with the ability to survive and reproduce produced by chemical reactions under natural conditions, and a living offspring produced by it (or them) through reproduction.

So you should think clearly about why you are conscious.

There is awareness. After the concept.

There are creatures. In fact, the world is a sort of combination.

Sorting has a concept.

And there are creatures.

So biology is a sorting.

The conditions for the survival of living organisms are as follows:

Abiotic factors.

Suitable temperature.

A certain amount of moisture.

Plenty of air.

Biological factors: organic matter, inorganic matter (nitrogen and phosphorus.

Potassium inorganic salts. In the face of our great earth, there are these conditions, so naturally animals are born!

It's a very grand coincidence:

1. The Earth's position in the solar system is moderate, resulting in a relatively small temperature difference between day and night, and the temperature is moderate.

2. Due to a series of reasons such as volcanic eruptions and meteorite collisions, the earth has produced an atmosphere, shielded from the influence of a large number of cosmic rays and dust, and gradually formed a relatively stable geological and atmospheric circulation system.

3. Thunder and lightning are produced under a series of physical actions, or the huge energy in the earth's crustal movement and volcanic eruption causes some inorganic matter to fuse together and become organic matter.

4. In a series of changes, organic matter gradually took on the form of primitive organisms and began the grand evolution of life on the earth.

To sum up, why there are creatures on the earth, it can only be said that the earth has a good position, good star quality, and a series of harsh conditions for the birth of life, so there are creatures.

The point is that there is an atmosphere on the Earth's surface, creating a relatively stable environment.

And then there is water. And then ......Slowly, there are creatures. Matter begins to be exchanged, energy begins to be converted (the role of the sun cannot be ignored).

The temperature is right, the moisture is abundant...

The conditions under which life arises:

1) There are necessary constituent substances that can synthesize organic matter such as carbon, hydrogen, oxygen, nitrogen and other elements.

2) life requires moderate light and heat, the temperature is too high, and the chemical bonds of carbon atoms are broken; If the temperature is too low, the biological process will come to a standstill.

3) There is liquid water, which is an absolutely indispensable component of living organisms.

4) There is an atmosphere, and the atmosphere has three functions, one is that the atmosphere synthesizes organic matter through ultraviolet irradiation and electric sparks; the second is to protect life safety from meteorites and cosmic rays; The third is to protect the heat of the earth's surface.

5) The above conditions can be maintained for a long time, so that life has a process of generation, development and evolution.

The above conditions are fully met only on Earth, and the hope that was pinned on Mars in the past is now almost disappointed. Some people think that life is possible in Titan, where there is a primitive atmosphere like the Earth, close to one atmosphere, but it has not been confirmed so far, and it seems that the possibility of finding life in the solar system is unlikely.

Liquid water, between 0 and 100 degrees, is necessary for the existence of all life.

The proper greenhouse effect is at least a necessary condition for the existence of higher life.

Air is a necessary condition for the existence of life.

The necessary conditions for the existence of life are external energy and the environment that guarantees the transformation of energy.

Life on Earth depends mainly on the sun and water, but there are also those that rely solely on geothermal heat and seawater to survive.

The means of delivery you are talking about to complete immigration are unlikely to be possible at the current level of technology.

But we can imagine that at some point in the future, the earth will be destroyed. Earthlings will launch delivery machines called "life eggs", which contain equipment and databases that can replicate life on Earth, and record all the scientific civilizations created by humans at that time. These "life eggs" have been in the universe for tens of thousands or hundreds of thousands of years, and as soon as they find a planet suitable for life on Earth, they will land and begin to hatch life on Earth, and replicate the ancestors of humans on that planet.