Bai Jizhen thought for a moment: "By the way, all three of us chose the incarnation of a positive one, right?"

Ke Like nodded thoughtfully: "It makes sense."

Wang Qi was stunned: "What does it mean?"

"It may be the male cycle of the female." Ke Like explained.

According to the classification concept of "yin and yang gender" by the Tianjuan clan in the past, positive is "providing half of the variable sex", while negative is "providing all structures other than that". This means that if a negative creature wants to complete reproduction, it must prepare something with a life structure.

For organisms with cellular structure, they are "female gametes" and "eggs".

Negative gametes are more complicated than positive ones and are more troublesome to foster. Because, in addition to the "half variables" that positive gametes also have, there is also the basic "structure" of life. Negative individuals in many species need to be born at a specific time to foster negative gametes.

"The cycle of reproduction that is once a day and a half is too short, right?" Wang Qi blinked: "According to the Yin-Yang Strategy Theory [k/r Theory], this kind of creature that relies on fast reproduction is almost impossible to evolve into intelligence. Because 'fast reproduction' and 'linghui', one is Yin Ce and the other is Yang Ce. If such a creature happens to evolve into intelligence and escapes the original natural selection of things, its number will expand to a point that the environment cannot accommodate in a very short time..."

Ke Like nodded again: "Indeed, I have monitored the spiritual consciousness day and night, and I have never seen any Ming tribes around me. If a small group of Ming tribes are ascetic individuals, it would be okay if they don't do that, but if there is no one who does it clearly, it would be abnormal."

Bai Jizhen whispered: "Senior, that species that feels comfortable in that matter is actually not the mainstream..."

"Isn't this a matter of considering whether their menstrual cycle is only one and a half days?" Ke Like looked at Wang Qi: "What else do you find?"

Wang Qi nodded: "It really is. These are the two most commonly used practical units. Above this, there is another unit that is roughly equivalent to 'years'. According to my estimate, the time is about 270 days."

Bai Jizhen nodded: "Two-seventy days divided by forty-five days can be completely eliminated. It is clever, and it takes six months a year to create a strong sense of design."

"However, when describing the lifespan of monks, they usually use another unit of time, which I have calculated, is about 1,600 years or so."

Even if the people of fire follow the normal path of Nascent Soul Dharma, their lifespan will be much shorter than those of the same level of earth people. Low-level monks only have hundreds of years of life, while high-level monks only have thousands of years. It is appropriate to describe this length in units of time equal to about one thousand six hundred years.

"One thousand six hundred years?" Ke Like pondered: "This number looks a little familiar..."

"And I asked them what time to describe their own world." Wang Qi said: "In the Ming people's worldview, light will exhaust its own power after a long period of time. But what is really exhausted is actually only a part of the obvious manifestation of light. "Light" is a metaphysical concept for them, and what they usually come into contact with is the manifestation of this metaphysical object of light in the present world. In their concept, this time is about 1.4 billion and 7.7 million years."

Bai Jizhen was stunned: "Why is this number so specific?"

"They don't have the concept of 'year', and in their eyes, this is a complete unit of time."

"One.4 billion and seven.7 million years can be used to the previous forty-five or two hundred and seventy days... it cannot be eliminated..." Bai Jizhen said: "Is this... a lunatic?"

"Then they have a smaller unit of time, which describes daily movements, which is equivalent to one and a half minutes, and about twenty-three minutes."

Bai Jizhen was even more confused: "This time unit..."

Ke Like suddenly spoke: "To be precise, the half-life of radium 226 is 1,600 years! Radium is a radioactive metal with high element abundance!"

He suddenly remembered. For him, Ma Juli was considered the previous generation of the previous generation, but when he entered the Taoist era, the theory of Taitian Zun made some people pay attention to radioactive elements again, and the scientific research value of radioactive isotopes was almost mentioned in that era.

Before he joined Tianling Ridge, he was a disciple of Piaomiao Palace and was very sensitive to this.

Wang Qi applauded: "Actually, I can't confirm the previous few time units, but the time unit they describe the world..."

Bai Ji Zhenling said: "But, are there radioactive elements with half-life of 1.4 billion and 7.7 million years?"

Wang Qi reminded: "Try dividing it by two?"

"There are 3.85 million in 700 million..." Bai Jizhen pondered for a moment: "What a familiar number, is that...that..."

"The half-life of uranium 235." Wang Qi hugged his chest with his hands and shook his head. uranium 235 is the one with the highest abundance and largest reserves among the natural isotopes of uranium elements. On Earth, anyone who knows about "nuclear weapons" has basically heard of its name.

However, the Tianjian directly skipped fission and instead used fusion as its foundation.

After all, the abundant hydrogen element is really far superior to the uranium element. In other words, if all other elements are added to the universe, the abundance of the element is not as good as that of the hydrogen element.

Uranium 235 has no strategic position in this world.

"Then, eighteen hours, forty-five days and two hundred and seventy days are..."

"This is not a common isotope." Ke Like thought for a moment: "It is nickel five seven, iron five nine, cobalt five seven...ah!"

Under normal circumstances, the three elements of iron, cobalt, nickel are not radioactive. Because the most common iron, cobalt, nickel, are iron, cobalt, 59, and nickel, which are stable isotopes and do not have radioactive properties.

"However, the iron, cobalt, nickel that the Ming tribe can face is not mined from surface ores." Wang Qi said: "If I remember correctly, these three elements happen to be the main components of the core of the earth. On the other hand, radioactive metals are relatively large in mass, so they are easy to deposit. In addition, the high pressure underground, fission naturally occurs, and it is indeed possible that there are three relatively rare isotopes."

Bai Jizhen was shocked: "I... this... they don't even have the concept of 'mass', and they can still recognize isotopes and half-life? How is this possible?"
Chapter completed!