Later, the group came to the animal area.

There is nothing to say about normal animal farming, which completely simulates the conditions of ground farming.

From the air, pastures, feed, water, to temperature, gravity, all copy the environmental conditions on the earth.

The most important mission of the base is to study the impact of animal survival in different environments, especially on reproduction.

"In the past two years, we have done millions of animal tests in different environments, but we have encountered many difficulties."

Chen Bingde looked very depressed, completely lacking the spirit of introducing the plants, obviously, he felt a lot of pressure.

If you ask, what are the problems that need to be solved for human beings to carry out long-distance interstellar migration, it may not be enough to say for three days and three nights.

But if you want to sum it up in one sentence, the most important thing is to ensure that immigrants thrive.

Well, that's right, reproduction is important.

Just like when John Bull colonized North America, he went back and forth for more than a year, did those people want to go back to the British mainland, and then get pregnant, give birth to a baby, and then go back to North America?

Isn't that a joke?

In this way, colonial rule cannot be maintained at all, and no matter how many people immigrate at a time, they are still taking jujube pills.

It is difficult to maintain self-hematopoiesis without sustaining it with external blood transfusion alone.

Unless it's a very important place with very little manpower demand, this is more or less sustainable.

Therefore, in order to meet the needs of interstellar migration, the base has conducted a lot of animal breeding research.

It includes a series of studies on mating, pregnancy, and fertility in both gravity-free and high-gravity states.

"According to our experimental research, animals can carry out normal mating activities in a weightless environment with simple assistive devices.

But because sperm cells need gravity to move into the egg, this makes it more difficult for the egg to be fertilized in space.

Basically, the chance of conception will be 1 in 10,000, note that this is a record of mating during the time of ovulation, and only one in 10,000 matings will be successful. ”

Those present were all good at mathematics, and after a little calculation, they knew that in a weightless environment, reproduction could not be carried out at all.

How long does it take to mate 10,000 times in an adult?

Three times in one night, it will take more than nine years......

What's more, it is also necessary to consider the survival period of the egg, the egg survival period of ordinary women is mostly two days, ovulation once a month, and it takes twenty-four years according to seventeen times a night......

Basically, it is impossible for humans to thrive in a weightless environment.

"Even if fertilization is successful, the embryo is successfully formed, but it is difficult for the embryo to develop due to the lack of nutrient flow from the mother to the embryo.

Even if some of them are developed, they can be deformed due to a lack of certain key nutrients.

In fact, not a single case of the millions of animal tests we have conducted has been successful.

It wasn't until gravity reached 0.64 times that the animal's reproduction returned to half of its normal level.

At 0.87 times the gravity, it can reach 90% of the normal level. ”

"So what is the state of animal reproduction in a high-gravity environment?" Number One asked Chen Bingde.

"The greater the gravity multiple, the greater the proportion of premature carcass death and deformity.

In the range of one to two times gravity, the chance of conception remains the same, and above twice the gravity, the chance of conception begins to decrease, and it is a geometric multiple.

The probability of three times is reduced by half, the probability of four times is less than two percent, five times is only one percent, and more than six times, most animals are no longer able to survive. ”

In fact, in terms of adaptability to the environment, animals are far less strong than plants.

As long as the needs of light and water are met, most plants can survive and adapt to this environmental change in a very short time.

Animals are different, and if they can't have an explosive evolution, it will be difficult to adapt to this change.

As a result, they can only survive in their original place, and it is difficult to spread, and then they will lose in the competition for survival and eventually extinction.

"Although there are no successful cases, our researchers are still optimistic.

Because we insist on the theory of intermittent equilibrium in biological evolution, or the theory of punctuated equilibrium.

We believe that the evolution of organisms is discontinuous, with new species emerging rapidly in a short period of time, followed by evolutionary stagnation for a long period of time, until another rapid speciation emerges.

The evolution of living things involves both slow and gradual progress, as well as rapid leaps; It is both continuous and discontinuous.

Therefore, as long as there is a successful case, the whole evolutionary process will happen quickly, which will lead to changes in the whole group. ”

In fact, like the ability to learn in groups, biological evolution also has a group effect.

Just like when smartphones first appeared to replace feature phones, many people, especially middle-aged and elderly people, felt that smartphones were very complicated to use.

But when there are enough users, most people will naturally use smartphones.

A large part of them, without special learning and training, can be used naturally, which is a manifestation of the group effect.

The same is true for biological evolution, especially animal evolution, such as giraffes, when the first giraffe is born and relies on eating good leaves to get good living conditions, more giraffes appear.

"So now, we just need to find that flashpoint where evolution begins, and then we can do the rest of the process by nature.

If you are lucky, you can get results in three or five years, and if you are unlucky, you may have less in three or five hundred years. ”

After listening to Chen Bingde's confident introduction, No. 1 was completely unaware.

But he doesn't need to understand, he just needs to know that he is in trouble now, but there will be a good outcome.

One asked, "Don't we have a gravity control system, and even if there is no result in this, it should be fine, right?" ”

Wang Dao is also not surprised by this question, because many people have asked this question before.

But the main problem lies with himself, because he never said the price of the gravity control system.

So Wang Dao replied to No. 1 with a smile: "It is still necessary, because the cost of the gravity control system is too high."

Now you think it's cheap, it's because the material is free, the processing is automated, and more importantly, we don't profit from it.

In fact, according to our internal accounting, to maintain a 10% profit, the ex-factory price needs 1,000 yuan per square meter, which is not counting the price of the energy system.

So you calculate, how much would it cost if the gravity control system was laid in its entirety? ”

Number One listened and was secretly speechless.

Even if the moon is on the moon, the surface area is 3.976 times ten to the seventh square kilometer, which is 36.7 trillion square meters.

If it is all laid out, it will require 367 million yuan, or new dollars, the money distributed to the original foreigners after reunification.

Who can afford that? What's more, the Moon is just a relatively small moon.

Therefore, it is a profitable solution to let organisms complete the overall evolution and be able to adapt to different gravitational environments.

[.]