The sky was not yet light, and the earth was gray.

The entire ice field, with an unobstructed view, does not show any life.

A pair of large, gloved hands suddenly reached out from the ground and swept aside the accumulated snow.

Bi Fang gasped for breath and struggled to push the snow away, and the strong wind of the night completely blocked the entrance to the trench, which was at least thirty centimeters thick.

Leaning against the exit, Bi Fang took a breath, grabbed the ice on both sides, propped up his whole body, and then began to retract the rope.

After a night of freezing, the rope was frozen strong, and a few drops of water were frozen last night, and today it has been frozen a few centimeters.

The thickness of the ice is increasing.

After tying the rope and putting it in the backpack, Bi Fang turned on the live broadcast and said hello.

"Today is the second day of my survival in the North Pole, and I feel pretty good, although I'm a little hungry, but after all, there's only ninety-nine days left, isn't it?"

[I call 666]

[This forces me to give full marks, don't ask why you don't leave points for encouragement, he deserves it]

[Get up in the middle of the night to watch the live broadcast, mom sees the series]

[I'm sleepy, I haven't had a holiday yet]

The time difference between Greenland and China is seven hours, and there are not many viewers at this point.

Although Bi Fang's live broadcast has already gone global, the domestic audience is still the main force.

[Is it dawn at the North Pole?] 】

On the screen of the live broadcast room, the audience found that the sun had not yet risen, but it didn't seem to be as dark as expected, and the drone's night mode was not turned on.

"Because the snowflakes reflect the white light. The complex structure of snow is unable to absorb light. When a beam enters a snowdrift, it is quickly scattered by billions of ice crystals and air pockets, and most of the light is reflected back from the snowdrift. ”

"So as long as there is light one day, the place where there is snowflakes will appear brighter, but it will only be bright."

Bi Fang pointed to the stars in the night sky and clearly pointed out the source of the light.

For the vast majority of people living in cities, it is difficult to imagine a starry night, and even when the sun goes down, the night is by no means dark.

When the moon is full, it is even brighter, as if there is a street lamp shining on it.

The moon is not round in the night sky tonight, but there is still a lot of light, plus the wind blows up snowflakes, and fluttering snowflakes are formed four or five meters below the ground, but it is relatively bright.

However, the light was bright, but the snowflakes in the sky couldn't see the road clearly, but fortunately, the North Star could be faintly seen, which found the right direction for Bi Fang's progress.

"Now there are more than ten hours every night, and we can't waste that time, we can get up in three hours before the sun rises."

"To survive in the Arctic, whenever you want to enter the polar day or night, you must fix your biological clock, otherwise the upside-down routine will make you very tired and often feel headaches."

"If you sleep too much or sleep less, you will have a headache, so that you simply don't have enough energy to meet the challenges of the next place, so if you have the conditions, you must set an alarm clock, if you don't have the conditions, you can only rely on the body's own biological clock, but relying on the biological clock is a very difficult thing."

"How many of you like to stay up late? How often should I boil it? ”

During his trek, Bi Fang suddenly asked a question.

[Ahh

[Be confident, every day]

[Hey, in fact, it's not enough to study and work until midnight, but I've been doing this all day, and I always want to brush my phone at night and relax for a few hours, but before I know it, it's very late]

[Plus one, it hurts to get up every morning]

[Working until eleven or twelve o'clock, how can I be willing to go to bed directly, my life needs entertainment, of course I have to relax, and then I fall into a vicious circle (covering my face)]

Eight hours of work, eight hours of entertainment, and eight hours of sleep.

This is the product of a long struggle, but now it is common to work more than 10 hours, and even more than 12 hours.

Most people work for a better life, and there is no shortage of entertainment time, so naturally they can only encroach on sleep time, otherwise there is no point in living.

There are very few people who are financially free, and life is carried forward by the wheels.

Sometimes when I look at Bi Fang's chic world, everyone does not have a feeling of envy.

Although some behaviors will cause controversy in many cases, Bi Fang doesn't care, compared to the people who support him, those are a small number.

"In fact, many people's biological clocks are not 24 hours a day, but there is a certain error, usually this error is less than two hours, for example, a cycle may be 26 hours, or even 22 hours, but most of them are slightly longer than 24 hours."

"This is a common phenomenon, with most diurnal animals having a slightly longer biological clock than 24 hours and most nocturnal animals having a slightly shorter biological clock than 24 hours. Humans are diurnal animals, so they belong to the former, and of course there are exceptions, which is not a theorem, but a summary law. ”

We don't know the reason for this, but one of the more likely conjectures is that when humans were born, the Earth's rotation cycle may not have been 24 hours. Because, in the past billions of years, the speed of the Earth has changed several times. ”

Hearing this, the audience in front of the screen seemed to have opened a door, and there was a sense of awakening.

[No wonder I stay up late every day, the more I stay up late, the more I stay up, that's how it turned out to be the dog's day! ] 】

[Stay up for an extra hour each time, and after twenty-four days, it will return to normal perfectly]

"Taking light as an example, most human biological clocks are slightly longer than 24 hours, so in the light-dark cycle that is slightly longer than 24 hours, human beings live most comfortably, because they are completely in line with their own circadian rhythm."

"And the earth's 24-hour light-dark cycle can actually be adapted, and the difference is not big. If the light-dark cycle is 50 hours, it is generally not adaptable. ”

"In other words, the human biological clock can be adjusted to adapt to the external environment, but there is a limit to this adjustment."

"In other mammals, light can regulate the biological clock through the suprachiasmatic nucleus in the hypothalamus through the light signal transduction pathway, but once there is no light, you can only rely on your usual habits."

"Once this cyclical biological habit is disrupted, the consequences include memory loss, lack of energy, easy headaches, and in severe cases, frequent diarrhea and vomiting."

"That's why self-discipline is very important."

Bi Fang continued to move forward, and it was by relying on his biological clock that he could wake up on time and not disrupt his forward plan because of sleep.

Advance until the sky is white, the wind and snow gradually stop, the snowflakes on the ground gradually fall silent, and in the sunlight, the mountains and rocks in the distance finally appear in everyone's field of vision.

"It's finally here."

Bi Fang breathed a sigh of relief, there are ups and downs, which means that there are mountains.

Where there are mountains, there are rocks, soil, plants, animals.

Although it is said that the mountain is running a dead horse, no matter how it is, it is much better to not see the mountain.

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