"There are different opinions about the reasons for the formation of the Ice Age, and there is no clear answer yet. There are several main sayings:

1. Less sunshine in the summer half of the year. It is mainly related to the eccentricity of the Earth's orbit, the angle of intersection between the ecliptic plane and the equatorial plane, and the precession.

2. When the sun travels to the galactic core region, the magnitude is the smallest, that is, the energy radiated to the earth is also the smallest.

3. The material in the Milky Way is unevenly distributed, and when the sun revolves around the galactic center, it enters a region of high-density interstellar matter, and the sunlight is absorbed too much by the interstellar matter, so that the energy radiated to the earth is reduced.

4. It is associated with the drop in the temperature of the earth's surface. The temperature of the earth's surface is related to the composition and transparency of the atmosphere, the amount of solar radiation energy, the orbit of the earth and the sun, the tectonic movement of the earth, and so on. ”

Wang Channel: "The Ice Age was an extremely complex system, and it was difficult for people to find out why it was formed. In short, there are two reasons why the earth is divided into two parts:

One is that the region of the Earth (the Earth-Moon region) receives less radiant energy from the outside. These include the weakening of the Sun's own activity, the enhancement of interstellar material absorption, and the superposition of the two, the rotation of the Sun, the rotation of the Sun, and so on.

Second, the temperature of the region where the Earth is located (the Earth-Moon region) has decreased. Including the earth's tectonic movement, the weakening of the earth's internal activities, the shielding and insulation of carbon dioxide, the melting of glaciers in the north and south poles, the absorption of heat and cooling, the blocking of sunlight by volcanic ash, the conversion of the earth's magnetic poles, the rotation of the earth, and so on.

As the saying goes, 'Everything grows on the sun!'. It can be seen that in people's lives, they have long recognized that the sun plays a leading role in the survival and development of the earth. The sun is not only the material and energy center of the solar system, but also the center of energy radiation and temperature control.

The Earth has some autonomy over temperature, but that is inside the crust, not on the surface or outside the crust.

In addition, current human activities can change the temperature in a small range. ”

The real person in charge yawned and said: "As human beings continue to become stronger, the scope of human autonomous control has gradually increased. I hope that in the future you will be free from the influence of the sun and free in the void. I'm getting old, I'm a little tired, I'm a little sleepy. Qilan, you take the two distinguished guests to rest. ”

Wang Daodao: "The real person in charge, the infinite real person, the immeasurable real person, I will retire! Good night!"

"Good night!"

"Good night!"

At noon the next day, Wang Tong and others had a sumptuous and delicious celebration banquet, and then said goodbye to everyone in Huolin Dongtian.

The crowd came to the gate of the cave.

He Qilan and Shui Xiaotong were reluctant, Shui Xiaotong said: "Sister Qilan, you have to come back to see me often!"

He Qilan said: "Okay! When you come out to travel the rivers and lakes, remember to come to the mountain country to find me." ”

Shui Xiaotong said: "Okay! I will eat you poorly." ”

He Qilan said: "Silly girl, how much can you eat?"

Shui Xiaotong made a big circle with both hands and said, "A lot! A lot! As soon as you leave, I won't be fun, you have to compensate me." ”

He Qilan said: "Aren't there other senior sisters and sisters playing with you?"

Shui Xiaotong said: "Your flute is the best, but it's a pity that you won't be able to hear beautiful music in the future." ”

He Qilan said: "You can blow it yourself!"

Shui Xiaotong said: "My talent is not as good as yours, and it doesn't sound good!"

He Qilan said: "Practice more! Work hard! You will get better!"

Shui Xiaotong said: "Well, senior sister, take care!"

He Qilan said: "Senior sister, you also take care! If you have any difficulties, remember to come to me!"

Shui Xiaotong said: "Okay! Thank you!"

He Qilan hugged her, then walked up to the head of the immeasurable real person, made a big salute, and said, "Master, the disciple is not filial." Please take care of your old man!"

The head of the family is immeasurably humane: "Qilan, in a blink of an eye, you are an adult, and you are also married." In the future, you can't be willful, you must be thoughtful in doing things, you must compare your heart with your heart, and be considerate of each other. I hope that you will be more affectionate than Jin Jian and grow old together! This box is a dowry given to you by Master, so you can accept it!"

He Qilan bowed her head and thanked: "Thank you, master!

Wang Tong bowed his hand and said: "Three seniors, brothers and sisters, we have been here for many days, and we have been warmly entertained and carefully taken care of by everyone. We would like to express our heartfelt thanks to all of you in the future to come to the Alpine Country, and let me do a little bit of the friendship of the landlords. ”

The head of the family is immeasurably humane: "Virtuous son-in-law, I have handed over our precious apprentice to you." You have to take good care of her, don't treat her badly, if you treat her badly, then we will fight this old life, and we will also ask you for an explanation!"

Wang Daodao: "Please rest assured that the seniors will live up to Qilan's deep friendship in the future!"

The head of the immeasurable real person: "Okay! With your words, I will rest assured! If there is anything bad about Qilan, please bear with her and be considerate, and let her be a little bit." She's spoiled by us in the cave. ”

Wang Daodao: "The son-in-law knows, and he will not let Qilan be wronged." ”

The head of the immeasurable real person smiled: "Okay! You must say goodbye to you for a thousand miles, you have a smooth journey!"

Wang Daodao: "Everyone, goodbye!"

"Goodbye!"

"Have a safe journey!"

With a wipe of the hands of the people, the door of the cave opened, and Wang Tong walked out with Hu Yunfei and He Qilan. Summoning the Xuanyuan Sword, the Xuanyuan Sword continued to grow larger and wider, suspended in the air. Wang Tong jumped up, stood at the front, and said to He Qilan and Hu Yunfei, "Jump up." Hold me tight. ”

He Qilan said: "Sister Yunfei, you are a sister, you go first!"

Hu Yunfei said: "Sister Qilan, you are your sister, or you go first!"

Wang Daodao: "Don't be humble! Qi Lan will go first, Yun Fei is more skilled than you, stay in the rear to take care of you." ”

He Qilan jumped up with a red face, waved her hand at the crowd below, and said, "Master, uncle, uncle, take care! Senior brothers and sisters, you also take care!" and then hugged Wang Tong with both hands around his waist.

Hu Yunfei jumped up, hugged He Qilan's waist, and said, "Three seniors, senior brothers and sisters, there will be a period later!"

Wang Tong turned his sword head and said, "Three seniors, senior brothers and sisters, I will wait to say goodbye!

The immeasurable man said, "Go ahead, stay safe!" and waved his hand!

The others waved goodbye!

Wang Tong turned the head of the sword again, activated the protective energy shield, and protected the three of them from the suffering of wind and cold and unexpected attacks.

Wang Tong Edgeworth passed through the distorted space and air barrier, came to the outside space, turned on the Beidou satellite positioning recognizer, and chose a safe route.

Wang Tong said: "Qilan, Yunfei, you hold on tightly, I'm going to start accelerating." ”

The two girls said in unison, "Okay!"

A sword light streaked across the sky, and the Xuanyuan sword flew up like a bullet, reaching the stratosphere. Soon the speed of sound was reached, and a sonic boom sounded, forming a white funnel-shaped white cloud behind the Xuanyuan Sword.

"Quick! What's that weird sound?"

"It's the sound of a sonic boom. When the speed of the object is close to the speed of sound, there will be a strong resistance, causing the object to produce strong oscillations and the speed decays. This phenomenon is called sound impairment.

When the velocity of the object is greater than the speed of sound, it will break through the sound barrier, and gradually accumulate on the windward side of the object due to the compression of the air itself cannot be propagated in time, thus forming a shock surface with a high concentration of acoustic energy. When this acoustic energy reaches people's ears, it resembles a strong explosion and is known as a sonic boom. ”

"It's a terrible sound, let's slow down!"

"Okay!"

Wang Tong slowed down and flew at about 300 meters per second.

"The clouds below are beautiful, white, gray, black, golden, yellow, red, purple...... Some are like small islands, some are like whales, some are like mountains, some are like wild horses, some are like human heads, and some are like turtles...... It's so beautiful! That cloud is like a snowy mountain, let's fly over and take a look!"

"Clouds are beautiful, but it's dangerous to get close to them. In general, cumulonimbus clouds are negatively charged at the bottom and positively charged at the top. It will discharge electricity in the air near them, forming lightning, which is how lightning is formed. The length of lightning varies from a few hundred meters to several thousand meters, and the larger the cloud, the larger and longer the lightning emitted. So it's best to stay away from cumulonimbus clouds and try to pass through them directly as much as possible to avoid being killed by lightning. ”

"Isn't it dangerous to say that Edgeworth is flying?"

"As long as you fly above the stratosphere and fly less in the troposphere, there is no big problem. You see, airplanes are also made of metal, and their safety factor is also relatively high, much higher than that of cars. Or use the metallic magic weapon correctly and avoid the danger zone, and there is no problem. Or there is a strong shield against lightning and no problem. ”

"Are our shields strong enough?"

"It's relatively strong, as long as it doesn't encounter a particularly huge lightning bolt of metamorphosis, it's generally no problem. ”

"Why are the people in the high places of the earth, in the trees, in the wilderness, etc., struck by lightning?"

"Because objects in the Earth's crust and on the Earth's surface are positively charged, the positive charges of relatively high objects are closer to the negative charges of the bottom layer of Cumulonimbus clouds, and the air path between them is the shortest and the most easily penetrated. So during thunderstorms, don't take shelter from the rain under trees and high places to avoid being injured by lightning!"

"Alright! We're almost there, we're going down. Stand firm. ”

Wang Tong's imperial envoy Xuanyuan Sword flew downward, slowed down, and soon entered the troposphere, avoiding large clouds, passing through small clouds, and the ground became larger and larger.

Mountains, lakes, cities, fields, high-rise buildings, roads, railways, and so on slowly appeared.

"It's beautiful! This is the country you live in!"

"Yes, there is beauty in the air, the overall beauty of the picturesque mountains and rivers, the majestic and majestic overall beauty, the hazy beauty of clouds and mist, half-covered and half-hidden. There is the beauty of the ground on the ground, the classical beauty of small bridges and flowing water, pavilions and pavilions, and the modern beauty of high-rise buildings and bustling and lively. ”

Wang Tong circled the air of the city a few times, slowing down. After a clear roar, a huge golden eagle with dark golden-brown feathers flew into the sky. After the golden eagle Jin Yong saw Wang Tong, he let out a joyful carving sound.

Escorted by the golden eagle, Wang Tong flew into the palace and stopped at a height of one foot above the ground. Hu Yunfei and He Qilan jumped down.

Wu Mei'er, Lin Chuchu, Bai Fu and others greeted her, and Wu Mei'er smiled and said: "Brother Tong, you are finally willing to come back! I see that you are happy outside again! What do you gain?"

Wang Channel: "I have gained some knowledge and made some friends. Come here, let me introduce you. This is Wu Mei'er, Princess Mei, my wife. This is Lin Chuchu, my apprentice. This is Bai Fu, my sister-in-law. This is Princess Fei, you are familiar with it. This is He Qilan, Princess Lan. ”

Everyone greeted each other and greeted each other.

Wu Meier took He Qilan's hand and said with a smile: "Sister Qilan, let's go and go home to talk." Tell me how you and Brother Tong met?"

He Qilan replied a little stiffly, and seeing that Wu Mei'er was gentle and polite, she slowly calmed down, and the women walked towards the palace with a smile.

Hu Yunfei glanced at Wang Tong with a smile, then gave a helpless look and followed.

Wang Tong, who was left out in the cold, waved his hand at the golden eagle and rewarded it with a spirit fruit, and the golden eagle opened its mouth to catch it, spread its wings and flew into the distance.

Wang Tong followed a little lonely, and after thinking about it, he became happy again. Wu Meier warmly received He Qilan and did not give her a look, which shows that she has the capacity to accommodate people and save face for herself. It's just that I'm not satisfied with myself too much, so I give myself a little warning. It seems that he should appease Wu Mei'er well, and he should also settle He Qilan well, so that the two sides can live in harmony. In this way, they can live up to it.