Enter the Immortal Cultivation

For humans, having a "calendar" is a natural thing.

Humans have an innate biological clock, and this biological clock is completely consistent with the rotation of the planet - perhaps for creatures living on the surface, having such a rhythm is more conducive to foraging. Or conversely, their foraging behavior has formed a screening mechanism in the process of evolution. In short, when people evolved the advanced entertainment function of "consciousness", the "rhythm" they had was already tied to the change of day and night.

This is the most natural time unit - "day" and "day".

In addition, the "month" generated by the change of satellite shadows, and the "season" and "year" caused by the frequent changes in sunlight caused by the obliquity of the ecliptic are all very natural units.

The only problem is that several units do not actually fit well. For example, a sidereal year in Shenzhou is about 365 and a third days, while a sidereal month, a round of moon phase changes, is 27 and two-fifths days.

Unless someone is willing to live a calendar with 13.33327 months and 27.4 days per month, the natural lunar calendar and solar calendar are mixed together.

This is obviously counterintuitive. A pure lunar calendar is also difficult to use to guide agriculture. And a pure solar calendar is difficult to correspond to the moon.

The Shenzhou people also developed the great invention of the "lunar calendar" in a long history.

In other words, the concept of "one month and thirty days" that is taken for granted by the human race today was not so taken for granted in the past. It goes without saying.

Shenzhou has "natural rhythm", "stars" and "only satellite" to specify the calendar at the same time, which is simply a natural advantage.

Among the species that have been recorded, Tianshen, where the Nan people are located, has two satellites. The changes in the moon phases are so complicated that they are outrageous. Strictly speaking, a complete change in the moon phase cycle is even longer than a local sidereal year, so the Nan people cannot understand the concept of "month".

And the hills are even worse. The hills were covered by the powerful qi created by the mysterious strongman Black Star. The entire planet was dark and could not feel the changes of the sun, moon and stars.

And they only used their own natural rhythms - sleeping and waking, growth, reproduction, etc., as their own calendar.

And according to Wang Qi's understanding, the True Flame God also specified the calendar in this way. The stars are too bright, so it is very difficult for them to observe the stars. Although their light sense has a wide range, it is not as sensitive as that of the human race - after all, the environment is so bright, being too sensitive is equivalent to being allergic every day.

Therefore, they can hardly see the stars.

Without a reference, even if the stars rotate, they cannot specify the rhythm based on this.

On the other hand, the True Flame God does not have a "sleep" state, so they do not have the concept of "wakefulness" like the people of the hills.

And in theory, the Ming clan should be similar.

"Based on my personal experience, this... I don't know how to pronounce it, it's equivalent to a day and a half, it's not a period of sleep and wakefulness for the Ming people. They do have the concept of 'rest', but it doesn't have a clear rhythm like us." Wang Qi stood up with a somersault: "In fact, it hardly conforms to any biological rhythm of the Ming people..."

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

Ke Li Ke nodded thoughtfully: "That makes sense."

Wang Qi was stunned: "What do you mean?"

"It may be the physiological cycle of females." Ke Li Ke explained.

According to the classification concept of "yin and yang gender" of the Tianjuan descendants in the past, the male is "the sex that provides half of the variables", while the female is "the sex that provides all the structures besides that". This means that if the female creatures want to complete reproduction, they have to prepare something with a life structure.

For organisms with cell structures, it is "female gametes" and "eggs".

The female gametes are more complex than the male ones, and it is more troublesome to breed. Because, in addition to the "half of the variables" that the male gametes also have, the female gametes also have the basic "structure" of life. The feminine individuals of many species need to breed feminine gametes at a specific time.

"A reproductive cycle of one and a half days, isn't that too short?" Wang Qi blinked: "According to the Yin-Yang Strategy Theory [K/R Theory], it is almost impossible for such creatures that rely on rapid reproduction to evolve intelligence. Because 'rapid reproduction' and 'spiritual wisdom' are a yin strategy and a yang strategy. If such creatures happen to evolve intelligence and escape the primitive natural selection, then their number will expand to the point where the environment cannot accommodate them in a very short time..."

Ke Li Ke nodded again: "Indeed, I monitor with my spiritual consciousness day and night, and I haven't seen any Ming people around. If a small The Pi Ming people are abstinent individuals. It's okay if they don't do that, but it's abnormal if no one does it. "

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

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

Wang Qi nodded: "Really. 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 hundred and seventy days divided by forty-five days can really be divided. It's clever, six months a year, the sense of design is very strong."

"However, when describing monks' longevity, they usually use another unit of time. I have calculated it, which is approximately equivalent to about 1,600 years."

Even if the people of fire follow the normal path of Nascent Soul, their life span will be much shorter than that of the people of earth at the same level. Low-level monks only have a lifespan of hundreds of years, and high-level monks only have a few thousand years. It is appropriate to describe this length in terms of a time unit that is approximately equivalent to 1,600 years.

"Sixteen hundred years?" Ke Like pondered: "This number looks a little familiar..."

"And I asked them how much time they used to describe their own world." Wang Qi said: "In the world view of the Ming clan, the light will exhaust its own power after a long period of time. But the real exhaustion In fact, it is only a part of the appearance of light. "Light" is a metaphysical concept to them, and what they come into contact with in daily life is the manifestation of this metaphysical thing in the real world. , this time is probably 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'. In their eyes, this is a complete unit of time."

"The 1.4 billion and 7.7 million years can't be divided evenly by the previous 45 days or 270 days..." Bai Jizhen said: "Is this... crazy?"

"Then they also have a smaller time unit that describes daily actions, which is equivalent to a quarter and a half, or about twenty-three minutes."

Bai Jizhen became even more confused: "This unit of time..."

Ke Like suddenly said: "The half-life of radium - to be precise, the half-life of radium 226, is one thousand six hundred years! Radium is a radioactive metal with high element abundance!"

He suddenly remembered. For him, Mrs. Ma Juli is considered the previous generation, but in the era when he entered Taoism, Tai Tianzun's theory made some people pay attention to radioactive elements again, and the related scientific research value of radioactive isotopes was mentioned at about that time. .

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

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

Baiji Zhenzhen said: "But, are there radioactive elements with a half-life of 1.4 billion and 7.7 million years?"

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

"There are 3.85 million out of 700 million..." Bai Jizhen pondered for a moment: "It's such a familiar number, it's that... it's that..."

"The half-life of uranium 235." Wang Qi crossed his arms and shook his head. Uranium 235 is the most abundant and abundant natural isotope of the element uranium. On Earth, anyone who knows about "nuclear weapons" has basically heard of its name.

However, Tianjian directly skipped fission and was based on fusion.

After all, the hydrogen element is really far more abundant than the uranium element. In other words, within the scope of the universe, the abundance of all other elements combined is not as abundant as that of hydrogen.

Uranium 235 has no strategic position in this world.

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

"These are not common isotopes." Ke Like thought for a moment: "They are nickel 57, iron 59, cobalt 57...ah!"

Under normal circumstances, the three elements iron, cobalt, and nickel are not radioactive. Because the most common iron, cobalt, and nickel, namely iron 56, cobalt 59, and nickel 58, are stable isotopes and are not radioactive.

"However, the iron, cobalt and nickel that the Ming people can face cannot be mined from surface ores." Wang Qi said: "If I remember correctly, these three elements happen to be the main components of the earth's core. . On the other hand, radioactive metals are easy to deposit because of their relative mass. Coupled with the high pressure underground, fission occurs naturally, and there may indeed be three rarer isotopes.”

Baiji Zhen was shocked: "I...this...they don't even have the concept of 'mass', but they can still understand isotopes and half-lives? How is this possible?"

Wang Qi spread his hands: "I don't know either, but among their several time units, the smaller ones are fine, but the larger ones are difficult to divide from each other. Apart from this set, I can't think of any other ones. Internally connected.”