Are there really aliens? At least I believe. But there is no theoretical basis, what do you think?

Everything has a root, and plants and animals are not creatures of the earth, and if they drift over, then they drift through"Flora and fauna"Isn't there a living thing on the planet?

Of course, there is more than one galaxy in the universe and more than one solar system.

If there were no aliens, how could there be humans?

It is believed that there are aliens. The universe is so big. There can be an earth suitable for human beings. How could there be no other creatures? At most, it doesn't look like us.

Yes I saw UFOs in the sky when my dad and I were driving

Yes! Many scientists believe this.

Aliens I've seen on TV.

The theory that aliens don't exist is the Great Filtration Theory.

Basic probabilistic assessments suggest that extraterrestrial life should exist. Since we have yet to have contact with extraterrestrials, one theory is that there should be some barrier that prevents life from interstellar travel, or at least from communicating with other extraterrestrial life. This barrier is known as the Great Filter, and it may be a force or event that prevents extraterrestrial civilizations from interstellar travel or communication.

The basis for the non-existence of aliens

If this theory is true, there are two main reasons why we have not come into contact with extraterrestrials: first, that an extraterrestrial civilization has self-destructed before it reaches a certain level of sophistication to explore other star systems; The second is that on a technical level, interstellar travel is simply not feasible. But none of these explanations are convincing.

Robin Hansen, an assistant researcher at the Institute for Future Humanity at the University of Oxford, pointed out that the probability of a filtered event being equal to or greater than the probability of the alien itself existing.

No extraterrestrial civilization has significantly colonized our solar system or neighboring star systems. Of the countless stars that scientists have explored before, no extraterrestrial civilization has been found that has reached these technological capabilities. This implies that there is a great filter between ordinary inanimate matter and rapidly developing sustained life forms.

The universe is so big, the earth can really be said to be a grain of sand in the galaxy, but the key is that human beings have not found life in any celestial body other than the earth, although many scientists now say that there is a great possibility of life on Venus, Mars, Jupiter moons and other celestial bodies, but there is no "living life", so some people do not believe in the existence of aliens or extraterrestrial life, which is also a normal thing, you have no evidence, and there is certainly no way to say that you believe it.

Scientists, including scientists, will never be able to confirm the existence of extraterrestrials or extraterrestrial life if they still can't find evidence in the future. Therefore, now human beings can only accelerate the search for evidence to convince everyone of the existence of extraterrestrial life or aliens, so that there will be no more disbelief.

To believe or not to believe in the existence of aliens, there is only one proof left.

In fact, as we said above, it is necessary for human beings to prove that there are really aliens now, not to see that a certain phenomenon is related to aliens. Although there are at least 2 trillion galaxies in the universe, only Earth has life on any planet known to mankind. Nowadays, we do see a lot of unsolved mysteries, but these phenomena cannot be explained by science, and it is actually a redundant choice for everyone to link them to aliens.

From a scientific point of view, many of them may be able to be explained.

If aliens exist, is it still necessary for humans to explore?

Therefore, the exploration of extraterrestrial civilizations can still be implemented, it depends on how human beings measure this problem, of course, the follow-up problem is only secondary, and now human exploration of extraterrestrial civilizations or extraterrestrials is unknown.

What are the main celestial bodies where extraterrestrial life exists today?

In fact, as we have said above, the main objects of doubt include Venus, Mars, Jupiter moons and other celestial bodies, and now the first celestial body we explore can be said to be Mars, NASA has released the Perseverance Mars rover, ready to explore life on Mars under the surface of Mars, so as soon as 2021, human beings may solve the possibility of whether there is life on Mars, Because at this time, NASA's Perseverance Mars rover may have landed.

Therefore, on the whole, extraterrestrial life or extraterrestrials can only be determined after human beings find evidence, and no scientist or expert in the scientific community can affirm the existence of extraterrestrial life, and how soon it will be discovered, let's wait and see.

At present, there is no evidence of aliens in the universe, so there are no aliens, and if aliens really exist, then with so many planets observed by the earth, traces of aliens have already been discovered.

There is no definite evidence that there are aliens, and no one has ever seen aliens, so I don't believe it.

Because I've never really seen aliens, and I've never heard real news about them.

1. Whether aliens really exist is inconclusive for the time being, but it is more reasonable to have evidence that aliens exist more than they do not.

2. Theoretical basis for supporting the existence of aliens:

1) The universe is too big.

As we all know, humans now know a lot more about space than they used to. But the universe is so huge, and human beings only know little by little. The size of the known universe is only 93 billion light years, which is still surveyed by humans, and no one knows how big it is.

If it is said that such a large universe is just that there are human life on the earth, the vast majority of people should not believe it.

The important thing is that there are so few things that earthlings are now able to study the universe that they can't even prove that they don't. How can something you don't know know know for sure and say no? Just like many years ago, people didn't know that the earth was round, and the ancient Chinese people also put forward the theory that the sky is round and the place is round, but in today's society, it has been completely overthrown.

The ancients used to walk from Beijing to Guangzhou for more than a few months, but now it can be reached in a day, and people at that time probably didn't dare to think about it.

2) The universality of matter.

There are a lot of resources on the earth, such as mineral resources such as iron and **, as well as water and the like, which are not only existing on the earth, but also on other planets. There may also be a possibility that there is a planet that cannot be explored by earthlings, and there is also a planet with such a large amount of water resources, and with the necessary conditions such as water and food, life will find its own way.

3) Probability issues.

Life has already been born on Earth, which means that the probability of life being born is not zero. Then, since there is already a 1, the probability of life being born again in such a large universe is much greater.

Listen to Ning Hao's science popularization of what kind of existence aliens are.

I think aliens are supposed to exist, but we can't find them yet, or never will. Do you think, how can there be only earthlings in the vast universe and countless planets? According to the research of American scientists, our galaxy alone is estimated to have 20 billion planets like the Earth (previously said that there are 2 billion, 60 billion, etc., in short, the number is very amazing), these planets have the conditions to support the existence of life, which means that not far from the earth, there may be extraterrestrial life.

And billions of extragalactic galaxies as huge as our own have been discovered in the universe! Therefore, it is safe to say that there are countless planets in the universe that are suitable for aliens!

Although it is generally believed that there will be extraterrestrials in the universe, modern astronomical observations have ruled out the possibility of extraterrestrials in the solar system. Entering interstellar space in light years is a distant distance that is difficult for us humans or other intelligent beings to conquer! Therefore, the huge distance in space seems to be an insurmountable obstacle to the interconnection of intelligent beings, so even if there are aliens, it is difficult for us to find out, and we do not know that they live in**.

So we don't know anything about the living conditions of aliens, let alone whether their technology is more advanced than ours. You can imagine that even the speed of light of 300,000 kilometers per second would have to travel for years, decades, hundreds, tens of millions of years, or even longer! What an unimaginably long and long distance!

Therefore, it is simply impossible for the so-called aliens to visit or invade the earth, or even kidnap and control the earthlings! Constrained by the laws of physics, it is hard for me to believe that intelligent beings can build spacecraft that can fly at the speed of light, which is all science fantasy, how can it be so easy? Therefore, it is not credible.

Taking a step back, even if intelligent beings were capable of building superspacecraft that could travel at or beyond the speed of light, it would be impossible to move freely in the vast interstellar space measured in light years. I am pessimistic about this, and I believe that human beings may only be able to exist alone forever in the universe!

It can be said that so far there is no real and credible evidence that aliens have visited our earth, and all rumors about aliens visiting earth are not credible. Therefore, I can tell you with certainty that no one has ever seen aliens with their own eyes, and that there is no scientific basis for what aliens look like.

What do real aliens look like? Is it so ugly? It may always be a mystery for us.

It's not enough to prove that aliens have visited Earth with just a few **, and I won't believe it anyway!

According to the latest reports, the latest research by Australian scientists says that there may be 200 billion terrestrial planets in the Milky Way, and there may be life on these planets.

First, let's imagine assuming that aliens live among us. So the first person to propose to look for aliens will be an alien who lives on Earth but wants to return home? Or the so-called "ghost" is a kind of alien, or even an earth creature itself, but lives in a four-dimensional world.

Just as the "painting" of the two-dimensional world cannot perceive the "objects" of the three-dimensional world, the "objects" of the three-dimensional world cannot perceive the "ghosts" of the four-dimensional world. But this can interfere, human beings living in three dimensions can draw two-dimensional pictures, but they cannot draw pure "lines" in the one-dimensional world, because no matter how thin the pen is, the drawn lines are wide and should be regarded as a long and narrow black surface. Therefore, we can guess that the "ghosts" in the four-dimensional world may be able to interfere with the "objects" of the three-dimensional world, or even modify them, and then make up new memories for me after modifying our appearance, what we do, and the surrounding environment, just like a cartoonist who is dissatisfied with his work, erases the work, redraws it, and rewrites the script.

In this way, we have indeed come into contact with the "aliens" of the two-dimensional world, that is, the aliens we write about. Scientists are looking for "aliens" in the three-dimensional world. In a dimension we don't know, the "aliens" of the four-dimensional world are watching us.

In different dimensions, the concept of time is also different, maybe our world, hundreds of millions of years, billions of billions of years, for their concept, is the time of an episode of a TV series, just as we can simply put a black screen in the TV series with a line of subtitles "five years later", and skip five years directly. It's a bit off-topic, but there must be aliens in the vast universe, and no one can say whether they can be found. Because no one knows how far away aliens are from us, how long it will take to invent a means of transportation that can pass by, and maybe we won't be able to do it until the sun runs out of energy.

Perhaps, from the rapid development of science and technology in the 20th century, it can be inferred that in about one or two hundred years, we will be able to move to extraterrestrial areas on a large scale.

But the "humans" in the three-dimensional world can never interfere in the four-dimensional world, unless the people in the four-dimensional world are willing. Just like a comic book character can't interfere with a cartoonist, unless the cartoonist's original intention is to let a comic book character from a two-dimensional world know about the existence of a three-dimensional world, such as the American comic book character Deadpool. Unless humans can have four-dimensional sensory organs, which is impossible.

Can comic book characters evolve the senses to perceive the three-dimensional world? Maybe somewhere in the four-dimensional world, a certain crew is filming a TV series called the universe, and all the things in our universe, all the people, all the planets, including the aliens, are being remade into a TV series by the people of the four-dimensional world in a way that is unimaginable in the three-dimensional world, and then the audience in the four-dimensional world is watching it in a way that is difficult for people in the three-dimensional world to understand.