In the middle of the night, when asked by a man, "Do you want to release water?", Bai Guoguo suddenly wanted to spit out the fragrance and greet all the female family members in the other party's family.

However, there are more important things at the moment, and Bai Guoguo directly ignored Chongyi's questioning.

"Heavy Wing, let me ask you, do you know where there is a mountain around here?"

"Mountain?"

"That's right! It's the kind that is tall and can dig holes in it! ”

Ginkgo fruit's eyes are shining.

If there is a cave, it is much more convenient.

However, Heavy Wing shook his head, "No. ”

“……”

Ginkgo was speechless.

No mountains?

So how did these primitive people who lived in ancient times survive the winter?

Or is it ...... There's no winter here?

Bai Guoguo felt as if he had discovered something extraordinary, and hurriedly asked, "Then is it so hot here all the time?" Is there a very cold and cold day? ”

"Yes, and then ......"

Chongyi said, pausing, his face tangled.

He didn't know how to describe the length of time.

Bai Guoguo blinked, and waited for a long time without waiting for the result before he reacted.

"Then tell me, how did you spend when it was cold?"

As he spoke, Bai Guoguo glanced at the tent with disgust, "Even your broken tent will definitely not be able to resist winter!" ”

At the mention of this, Chongyi's eyes suddenly darkened, and the whole person looked a little indescribably sad.

Bai Guoguo was stunned again, now he really couldn't figure out what made this big brother unhappy.

After a long time, Chongyi suppressed his voice and said, "When it's cold, we will try to stock up on some leaves as much as possible, and catch some large animals as much as possible and wrap them in their fur. Then everyone snuggles up to each other, and that's a little bit better. ”

“……”

Bai Guoguo was shocked and speechless again.

Just wintering with leaves and fur?

"No, don't you all have a fire?"

At the mention of this, the expression of the heavy wing looked even more complicated.

"Once it snows, the heavenly fire is extinguished. We also tried to bring the fire to the tent to save it, but the next day the people in the tent were ...... If you die, even if you don't die, those who survive will have all kinds of bad feelings. ”

The last two words, Chongyi said extremely heavily.

While listening, Bai Guoguo analyzed the reasons for this situation.

It seems that by the time winter comes, the tightness of the tent will be much improved.

However, this way, the air will not circulate.

For these people, the flames have to stay burning all the time, which causes the flames to burn and the normal breathing of humans to become hostile.

The same amount of oxygen cannot maintain the normal breathing of a tent person and the normal burning of the fire at the same time.

Therefore, once the oxygen in the air is consumed by the flames, it becomes difficult for humans to breathe.

Especially after entering a deep sleep at night, people's consciousness is not so awake, and it is easy to be so ...... Suffocate the past.

Even people who have not survived suffocation will experience various uncomfortable symptoms due to lack of oxygen.

Of course, there is also the possibility that the fire will go out.

However, once the fire is extinguished, the temperature in the tent will drop rapidly, and the person will not suffocate to death, but will most likely freeze to death.

Bai Guoguo analyzed the reason, but she couldn't explain it to Chongyi in a way she understood.

So, she had to sigh and pat Chongyi on the shoulder.