“Gentlemen, tell me what life is.What is the definition of life?”The hostess asked first.Her name is Heigl, and she is an astronomer.

Hearing this question, the various scientists in this space began to intersect their ears.

Life, a very magical thing, this concept sounds simple, but in the scientific community, there is no particularly good definition.In some textbooks, life is defined as an object that reproduces and actively consumes energy.

But people seem to be more inclined to define through their own senses whether something is life or not.Will it move?Do you take the initiative to get energy?Or will it reproduce?

A car can also move when it can ingest energy, but people think it is dead and does not have life characteristics.

An advanced robot, according to the program, can automatically ingest energy, and even self-replicate, of course, not life, this is the view of ordinary people.

“An organic, born from nature, actively ingests energy and is capable of self-reproducing low-entropy bodies, let’s call life.Maybe that’s the case in a narrow sense.”This is the conclusion of Yi Feng, and it is also the view of ordinary scientists.

Well, this definition is not much related, for the time being do not consider how the condition of "natural birth" should be characterized.According to this definition, these Martian viruses should be considered life, right?

“Yes, the Martian virus should be considered to be natural birth.”However, this kind of extraterrestrial life has brought great impact to scientists.

In the constant discussion of scientists, Yi Feng finally understood what they were saying, mainly because of the Fermi paradox.

In theory, humans can fly to various planets in the galaxy in 1 million years, 10 million years or even hundreds of millions of years, so that as long as aliens have evolved thousands or millions of years earlier than humans, they should now come to the solar system and be observed by humans.

Millions of years, millions of years, this kind of unit of time, is too long for mankind.But on the cosmic scale it is only a moment.The age of the universe is more than 13.8 billion years old!

Therefore, aliens that evolved thousands or millions of years earlier than humans are completely possible.

However, so far, apart from the inexplicable Noah, there have been almost no traces of aliens.

In other words, the “Fermi paradox” illustrates this paradox:

The scientific inference that aliens are the existence of aliens can prove that the evolution of aliens is far earlier than humans, and their traces should appear in the stars, but people have not found it.

Aliens do not exist, or humans are already the best civilizations in the universe.

Now people tend to the first view because of the appearance of the Noah.It must be the crystallization of a super-civilization, and it is the kind of borderless with a high degree of technology.It is impossible, Noah is a born and born...

The problem is that there is a higher degree of alien civilization.Why have humans never found traces of alien civilization?Why is the universe so empty and cold?

There must be a reason!

Now, scientists want to find that.

“There is an explanation that higher alien civilizations do exist, but in very small numbers, we have not found them.”

Host Heigl said she was a white-skinned middle-age woman with a pair of black-rimmed glasses that looked very solemn and dignified.

“Of course, we have other explanations, such as: Extraterrestrial civilizations deliberately avoid us for some reason and don’t let us discover them.”In other words, the universe is a completely dark forest, and when two civilizations meet, there will be wars and so on.”

“But these reasons are not sufficient ... and do not fully explain the empty silence of the universe.”

With the current astronomical knowledge, no one thinks that the earth is a special planet.The sun and the earth are just ordinary parts of the universe, without any particularity.

Therefore, some people began to study whether there is a planet similar to Earth in the Milky Way, and whether there is a more suitable environment for life.

In the vast galaxy, there are about 200 billion stars, and the planets are countless.Planets similar to Earth must exist, and in large numbers.

The more famous is the Drake equation, proposed by the American astronomer Frank Drake in the 1960s in the town of Green Bank, which can be used to speculate "the number of alien civilizations in the Milky Way, that may come into contact with us."

There have been those who calculated the number of extraterrestrial civilizations according to the Drake equation.According to calculations, the number of advanced technological civilizations in the Milky Way is at least 40, up to 50 million!

The famous American science writer Asimov, according to his own opinions, has proposed a formula similar to the Drake equation, estimating that there are about 530,000 civilized planets in the Milky Way.For every million stars in the Milky Way, there may be an average of 18 high-tech civilizations.

“But I think these estimates may be small.Because we miscalculated the conditions under which life was born...” Heigel said gravely.

Roman, Thomson, and others all nodded, and it was clear that they had discussed the subject many times.

“We used to think that life was rare.We believe that the conditions for the birth of life are very demanding, requiring water, having enough atmosphere, the right temperature, etc.”

"But I didn't expect that Mars has life, although it is only the simplest virus!"But that’s life too!”

"If life is rare, then how can the solar system have two living planets?"And we don't know if Etrive or Europa has any life, maybe there is?"

“If life is scarce, and there is a billionth chance, why does the solar system have multiple life planets?”

All the scientists began to think about Heigl’s question.This also makes Yi Feng fall into contemplation, assuming that life is rare in the universe, just like buying a lottery ticket, it is very rare to win once, so why does the solar system win one after another?

Is it particularly good luck?Or for some other reason?

After a while, Heigl continued to speak.

“The simplest explanation, our premise is wrong.Life is not rare... but universal!”

“Life is everywhere on every planet.Or, more than we think!”

This immediately caused a huge sensation, and even some subversive, and many scientists immediately jumped up in disbelief.Humans have been searching for extraterrestrial life, and as a result, extraterrestrial life is even universal, which is a little too unacceptably a little.

However, Heigl’s counter-epoofs are brilliant and logical.

In the universe, life is rare.So Mars is such a small, no feature of the planet, why do you have life?In the universe, there are no special planets like Mars, it is not too much!

Is it so lucky that any planet has found rare life?

Therefore, the assumption that life is rare is false.Therefore, if it is not true, life is likely to be universal.

Although I felt a little wondering in my heart, Yu Feng did not come up with a better explanation, nor did he think of anything that could be refuted.Saying that "the solar system is very special" and "human luck is particularly good" clouds are lying to themselves.

Are humans really so lucky that you can encounter small-probability events if you find a planet?

Well, life is universal in the universe, and perhaps... it’s true!If life is universal, then the solar system has multiple life planets, and it is not surprising.

"Yes, Professor Heigl, your reasoning is excellent, and there is a great possibility that you are right.But having life does not necessarily have wisdom.”

It was Dr. Lambo, the genius of the Tesla Research Institute, who discovered the Noah's "speed-beyond-the-speed plan."He is young, and he will not hold any thoughts, "It is also possible that life on most planets is a low-grade single-celled creature, and does not have intelligence."

"Yes, you are right."Heigl nodded and said in agreement, “So our next discussion is whether wisdom, too, has universality...”