Cyber ​​Heroes

Chapter 902 Only give...

Why did that alien spaceship, Ogun, come here?

It's clearly not for humans.Ogun's history is too long.When Australopithecus appeared, it was already on the road.It was obviously born earlier than humans.Unless its builder has mastered some technology beyond the law of causality, otherwise, this thing cannot be for human beings.

But every part of Ogonnelli indicates that its builder has the same level of technology as the earth, and it is even more impossible to have such a level of technology.

But it is also obviously not for spreading information about its own planet.The symbol system in Ogun's core is not for the convenience of aliens to interpret.It simply combines the considerations of noise immunity and information density.

The Pioneer 20 and Pioneer 70 space probes launched by humans in the 10s carried the famous "Pioneer gold-plated aluminum plate". At the upper left corner of the plate, there is an internal spin transition of a hydrogen atom. image, because hydrogen is a substance that exists widely in the universe.Below this symbol there is a short straight line, which represents a "11" in binary.In this kind of hydrogen atom, the electrons can specify a length (the wavelength is equal to 1 cm) and a time length (the frequency is 21 MHz) from spin up to spin down. These two derived units are used Calculate the meaning of other symbols on the board.1420 of the lines have a column of numbers written in binary, which represent the pulse signal periods of 14 pulsars (neutron stars) in the Milky Way.Since the signal period of each pulsar changes with time, aliens can calculate the launch time of the spacecraft based on the current pulsar period.The length of the lines indicates the distances of those pulsars relative to the Sun.The marks at the end of each line indicate its Z-coordinate intersecting on the galactic plane.

Additionally, there are images of a human male and a human female on it.

This set of information was later loaded into the Voyager and served as the cover of the Voyager Gold Record.

Although the amount of information is very small, it can at least be shown to aliens, and most aliens can interpret it.

As for the symbols in Ogun, human beings have no way to interpret them.

David said without hesitation: "Let's build a large spaceship first."

"Hmm." Xiang Shan nodded, "And then?"

Yawgmoth raised his hand and asked, "Anything else?"

"There are a lot of problems. This is a big systematic project, my friend. It's not just a scientific problem." Xiang Shan shook his neck: "For example, can a spaceship like Ogun be used for immigration?"

David shook his head: "Obviously impossible. Its strength is too low, it cannot withstand acceleration and deceleration, and there is a risk of being torn apart by gravity even if it skips over a large-mass celestial body—tsk tsk, thinking about it this way, it was not torn apart by Jupiter and Saturn It is lucky enough to be broken. Oh yes, it will take a century for it to fly out of the solar system."

"Then make the spaceship smaller..." Yawgmoth said.If you can't make a ship with enough shear resistance to maintain a giant attitude, make it smaller.But he quickly shook his head and vetoed it himself: "It seems that it can't be too small. But it should not reach the level of Ogun."

Any species has a minimum requirement for the size of its own "gene pool"—or the richness of its own species' genes.Adam and Eve are biological nonsense.It only takes one generation for the offspring of Adam and Eve to face the problem of inbreeding.The coefficient of close marriage among first-degree relatives is 1/4.That is to say, the individuals they bred have a 25% probability of each pair of alleles coming from the same common ancestor of both parents.This can spike the risk of autosomal recessive disorders in their offspring before it crashes.

As for the specific number of people needed, in fact, humans themselves have not studied it thoroughly.It has been suggested that this may require several hundred people.Some people think that at least 160 people are needed.Of course, there are also scholars who push the limits, thinking that the minimum number of people is only 98 people—a healthy group of 98 people is enough to rebuild human civilization.

In fact, genetic studies support this theory as well.Some scholars believe that the gene richness of the entire human population combined cannot compare with that of a family of chimpanzees.In a past that seems extremely distant to human beings but very close to the present in terms of evolution, human beings have encountered natural disasters, and there are only a few hundred Homo sapiens left in the true sense. Excellent configuration, multiplied to every corner of the earth.

Xiang Shan sighed: "On the contrary, Yog. This is not just a biological problem. People die accidentally. If you bring the number to the limit, then if one person dies randomly in this group, the gene pool of the immigration group will A precious piece of the puzzle is missing."

David nodded: "Space is no safer than the earth. Oh yes, the human body is adapted to the gravity of the earth. If gravity is not simulated by centrifugal force, human reproduction and growth will be affected."

"Secondly, there is the issue of willingness to bear children. If accidental death is not considered, then each couple must have two children, and then these two children must grow up safely, and then each child will have two children with their partner after they get married. To the children. That keeps the population constant. But what’s so safe about it? Accidental death is always inevitable. And not everyone expects to have multiple offspring these days.”

"Even in an extreme situation, if there is a poor guy with a bad relationship with the opposite sex, then mankind will have to suffer great misfortune-another piece of the puzzle will be permanently lost in the gene pool of the immigrant group."

"In addition, there are problems such as emotional discord after the marriage of husband and wife-unless there are regulations, free love is prohibited, and everyone waits for the system to assign a spouse. But that is too inhumane, and it is prone to short-sighted Self-screening. So you have to prepare ten times a hundred times the minimum number of people."

"And in order to ensure that this immigrant group does not suffer from mental problems on the boat and spend all day thinking about how to kill their companions to amuse themselves, they have to prepare a certain amount of space for activities."

"What about hibernation?" Yawgmoth asked.

David said: "Even the tardigrades that are best at the invisible state can't guarantee that they can survive [-]% after suspended animation. Judging from the current technical level, human hibernation technology is nonsense, and hundreds of them may be frozen." None of them may recover.”

"Freeze sperm and eggs? In this case, it is enough for one out of millions of sperm to survive." Yawgmoth said: "Hibernate a group of teachers... No, let AI raise them? This way the spaceship can be reduced A lot."

David spread his hands: "The artificial womb is a technical problem. And will the children educated by AI have any recognition for human society? They can already be regarded as another civilization."

David sighed: "In the final analysis, why should we design the immigrant fleet with the current level of human technology? This is impossible."

"How do I know." Xiang Shan sighed: "Suppose, join, NASA finds that the sun has signs of becoming a red giant star, it may be tomorrow, or it may be 500 years later, this process will be very sudden, and humans may lose it at any time." My own hometown. While studying the group evacuation plan, human beings must find ways to use existing technology to preserve the genetic information of their own race..."

　Surprise

　　
　
(End of this chapter)