Or are there aliens on the stars Are there aliens in the alien galaxy?

It was hard to say before, but now it seems impossible, the diameter is only half of the earth, resulting in the thickness of the atmosphere, the density, only 1 percent of the earth, the gravitational force is insufficient, resulting in the atmosphere can not lock the water, too far away from the sun, the rotation speed is not fast, the temperature is below minus 55 degrees all year round, there are ice caps in two levels, but unfortunately the content of water molecules is very low, mostly carbon dioxide ice, the surface of Mars is red due to the elevation of iron oxide content, and the perennial cosmic dust and ground debris storms, the speed can penetrate the windshield of the car. The environment is dry, so there is no life.

A Martian meteorite has been found to contain bacterial fossils, and iron oxide on the surface of Mars suggests that a long time ago, Mars may have had an atmosphere around it, and there was probably a time when oxygen was abundant, and there was probably a certain possibility of life, but now it can only be said that there is none.

The process of adapting Mars to life stopped 3 billion years ago, and today Mars is more like a giant fossil. However, there should be bacteria that hide underground and hibernate to adapt to the harsh environment. Remember that scientists once said that Mars seems to be tilted 45° to the sun every five million years, causing part of the ice to melt, in which case life is likely to flourish on Mars.

As for the multicellular organisms on Mars, I don't think that's possible, and this harsh environment is not suitable for the survival of huge multicellular organisms.

Wood has, and it lacks the substances necessary for the survival of living things.

Hope, thank you!

I watched the blockbuster movie, but no one really saw it, so the conclusion was that there were no aliens.

At present, there are many cases of alien discovery on Earth, but there is no conclusive evidence about aliens, and I think that the universe is vast and boundless, and there should be aliens

First of all, our universe is very vast. Even if it's the place we humans are currently detecting. There are also more than 100 supernebulae.

There are about 1,000 galaxies like the Milky Way in one supernebula. There are about 10,000 solar system-like galaxies in one Milky Way. It is possible that there is more than one planet in a solar system that has life.

So. Let's do the math.

100 1000 10000 1 = 1 billion. In just the places where we humans have explored, there are a billion planets like Earth that can be inhabited by life. For a variety of reasons, some planets cannot survive.

There are 10 million planets that can always allow life to survive.

I believe that extraterrestrial life exists, after all, the universe is boundless, and since the earth can have life, why can't other planets produce a high degree of civilization!

It is understood that there are 200 billion "brothers and sisters" of the sun in the Milky Way, and scientists have found 150 stars with planetary rings, which are distant relatives of the earth. Even if one of the 10 stars has planets orbiting, then the earth should have 20 billion brothers and sisters in the galaxy, just like only the earth has advanced intelligent life among the nine planets of the sun, then there should be 100,000-150,000 planets suitable for the development of life, and then intelligent life will be produced to form a technological civilization, and they should have a civilization similar to or more advanced than the earth.

So, the possibility of life in outer space is very high. It's just that we beings don't have a way to understand each other, and we also learn from them and think about the same problem. Life in outer space may be more advanced than our science, it may be even more backward, and whether we can find them is unknown.

That's my opinion.

Wish! o(∩_o.

Are there any aliens? According to the Fermi paradox proposed by the famous Nobel laureate Fermi, if there are aliens, then they may have come to Earth and exist somewhere, but they just didn't communicate with us, maybe our technology is too backward to detect them; Or that there is no other civilization in the universe.

Say the Earth, the Solar System, the Milky Way, what Orion, Ursa Major, this and that, Libra, Aquarius, how vast are these ranges, so vast that you have fresh water on Earth, you have life on Earth, people don't have it, it's unlikely.

The age of the universe is 100 million years, and the diameter of the universe is more than 92 billion light years. The age of the earth is 4.9 billion years, and life began to appear 1,013 million years after the birth of the earth, and 3,528 billion years have passed since the development of life on the earth to what it is today. Humanity has the technology it has now.

With the current technology of mankind, we are not yet able to conduct interstellar voyages.

Suppose life arose somewhere 50 million light-years away from Earth and evolved intelligent life. Their technology was 40 million years earlier than ours, which means that 40 million years ago, they could not carry out manned interstellar voyages, they could only emit probes or radio waves. It is basically impossible for their probes to reach the solar system, and the only thing they can reach is radio waves.

And these radio waves will have to travel in space for 50 million years, that is, another 10 million years to reach the Earth.

The above is based on the correct physical knowledge of our earth in modern times. 50 million light-years is a relatively small distance in the universe, and the diameter of the universe is 92 billion light-years ......

Life itself is fragile, and if life occurs on a planet, the possibility of being hit by a meteorite or becoming extinct for other reasons is also very high. The Earth was once struck and separated into two stars, the Earth and the Moon. Moreover, whether the birth of life on Earth was accidental or inevitable is still unanswered.

If it is accidental, then the possibility of extraterrestrial life is even less, and if it is inevitable, then there must also be extraterrestrial life. It is also difficult to judge whether their evolution was smoother than that of life on Earth (it took less time to evolve intelligent life from primitive life than on Earth) or whether life on Earth did not evolve smoothly (intelligent life did not evolve) in the presence of extraterrestrial life.

What do aliens look like? Is it an organism? Or robots.

The artificial intelligence of modern technology on the earth has been initially developed, and if highly civilized aliens exist, the artificial intelligence (robots) they create have a more cold and absolutely rational thinking, which is the most advantageous to survive in this universe, so it is very likely that highly civilized aliens exist in the form of robots, and it is very likely. Modern earthlings have been able to replace organs with some machines, and can implant chips in the human body, so will aliens be a combination of living organisms and machines? We know that in some countries, babies born have their appendix cut off to prevent appendicitis from occurring.

So, will it be that babies will be born with their brains removed and placed in some kind of machine? Isn't replacing fragile life forms with powerful machines part of evolution?

All of the above are based on the earth to consider whether there are aliens, or on the basis of our modern physical knowledge, the earth is used as a starting point to consider. So do these thoughts and laws apply to the universe as a whole? We are completely ignorant.

We still know too little about the universe, everything about the existence of aliens is just conjecture, everything is unknown.