Video spoilers history, starting with the blitzkrieg on Poland

A new sky screen appears.

In the dark universe.

The earth and the moon gradually emerged clearly.

The camera focuses on the lunar surface, and the grooves and undulations of craters and craters are clearly visible.

The camera slowly zoomed in, and suddenly - where the moon was supposed to be, there was only an empty starry sky.

The moon disappeared!
The low cello strings in the soundtrack came to an abrupt end, replaced by harsh electronic noise.

The narration of the sky curtain also slowly sounded:
[The moon is the only natural satellite of the Earth. Its average radius is about 1737.10 kilometers, which is 0.273 times the radius of the Earth. It ranks fifth among the satellites in the solar system.]

[Its average distance from the Earth is about 38.44 kilometers.]

[If calculated at the speed of light, it only takes about 1.28 seconds for light to travel from the earth to the moon. ]

[The moon is about 45.27 billion years old, almost the same age as the earth. ]

[Over the long years, it rotates counterclockwise around the Earth from west to east. ]

【For a long time, the moon has not only illuminated the night sky with its unique posture, but also had a profound impact on the earth. 】

[The bright moonlight has inspired countless literati and poets, carrying countless romance and poetry.]

【As Earth’s faithful companion for more than 40 billion years, the moon is much more than the “white jade plate” described by poets. 】

[It controls tides, stabilizes the Earth's axis, regulates climate, and even influences biological evolution.]

[However, what if one day, the natural satellite of the Earth suddenly disappeared? ]

[What kind of earth-shaking changes will the earth and even mankind face? 】

[The moment the moon disappears, the seawater will begin to flow back on a large scale due to the loss of the moon's gravity. ]

[A global super tsunami is very likely to follow. ]

[Coastal cities bear the brunt! ]

【This is just a small problem.】

【The key lies in the tide! 】

[The first second the moon disappears, the global sea level will begin to flatten. ]

[Because the periodic rise and fall of the sea water on Earth is mainly due to the gravitational pull of the sun and the moon. Although the sun has a huge mass, it is too far away from the earth.]

[So, in fact, the tidal force of the moon is about 2.17 times that of the sun, and is the dominant factor in tidal phenomena. ]

[Once the moon disappears, the tidal effects will be greatly weakened. ]

[The ebb and flow that people in coastal areas are accustomed to suddenly lost their original rhythm. 】

【The sea water no longer advances and retreats in a regular pattern.】

[Marine organisms that originally depend on tides for survival, such as crabs, oysters, and starfish, have their reproduction, foraging, and migration closely linked to the tides. ]

[The disturbance of tides will bring great crisis to the survival of these creatures. ]

[This in turn impacts the food chain of the entire marine ecosystem. ]

【But this is just an appetizer, the real disaster is in the deep sea. 】

[The ocean current system began to fail due to the loss of tidal power, and the Gulf Stream gradually stopped. 】

[Nutrients from the seabed are no longer transported to the shallow sea.]

[The phytoplankton were the first to suffer.]

[These microorganisms, which provide 50% of the Earth's oxygen, feed on nutrients transported by ocean currents.]

[As ocean currents stagnate, they die in droves, creating a chain reaction that hits the top of the food chain.]

【Within three years, the global fishery industry will surely collapse.】

[Coastal waters without tidal wash quickly turned into oxygen-depleted death cauldrons, with hydrogen sulfide oozing from the rotting carcasses of marine life, so much so that the sea breeze smelled of rotten eggs.]

【However.】

【It's too late to mourn the tide.】

[The next thing to collapse will be the earth's climate! ]

[The stability of the Earth's rotation axis is also closely related to the moon. ]

[The Earth currently has a tilt angle of about 23.5 degrees, all thanks to the 40 trillion tons of mass of the moon. ]

[This angle gives Earth its four distinct seasons.]

If the moon disappears, the Earth's axis of rotation will lose an important stabilizing force and begin to swing back and forth wildly.

[Over the long years to come, the Earth's tilt may vary randomly between 0 and 50 degrees.]

This will trigger extreme climate change.

[A region with a pleasant climate may sometimes be extremely hot and sometimes extremely cold.]

[Africa, which was originally warm and humid, may see glaciers. ]

[The cold Antarctic may experience a rise in temperature due to a change in its rotation axis, gradually turning into a desert or even a jungle.]

[Imagine that the equatorial region suddenly enters polar night today, and Siberia welcomes a high temperature of 50℃ tomorrow. ]

[Most organisms find it difficult to adapt to such drastic and frequent climate changes.]

……

Outside the sky, the ancient people were a little surprised when they saw this place.

The ancients were naturally familiar with the phenomenon of tides, but they did not expect that tides would be so profoundly affected by the moon.

Moreover, tidal effects actually affect the cycle of life and reproduction all over the world?
Zhuangzi was somewhat surprised and said:

"The moon is only a tiny fraction of the sun."

“I didn’t expect it would have such a profound impact on life on Earth.”

"Ah, the birth of life on Earth is simply amazing!"

And in the Southern Song Dynasty.

Emperor Gaozong Zhao Gou watched this video for fun.

He saw that after the moon disappeared, the earth's climate might change dramatically, and he couldn't help but comment:
"It seems that it is better for the moon not to disappear."

"Otherwise, what if my rich land of fish and rice in the south of the Yangtze River turns into a desert?"

"Then I will suffer a great loss."

...The sky continues.

【Not only that, the moon has always been like a solid shield for the earth. 】

【Silently endures the impact of numerous asteroids and meteorites. 】

[The densely packed craters on the moon's surface are a testament to its ability to protect the Earth from attacks.]

[If the moon disappears, the Earth will lose this protective barrier, and the probability of being hit by asteroids and meteorites will increase significantly.]

[The disappearance of the moon will also have a profound impact on biological survival and food acquisition. ]

【The growth cycles and behaviors of many organisms are affected by moonlight.】

[Studies have found that plants grow faster under moonlight.]

[The disappearance of moonlight may disrupt the biological clock of plants, affect their photosynthesis and metabolism, and thus affect the yield of crops. ]

[Plants are the basis of the food chain. If their growth is affected, the entire food chain will be impacted.]

[As the number of plant-eating animals decreases, carnivores will also face the dilemma of food shortage. ]

【Eventually, humans will also face severe famine due to reduced food sources. 】

[It even affects sleeping and reproduction. ]

[Since the age of dinosaurs, animals have relied on moonlight to regulate their reproductive cycles. Coral polyps lay eggs en masse during a full moon, and wolves coordinate their hunting based on the phases of the moon.]

[After suddenly losing this cosmic alarm clock, the animal world would collectively fall into chaos. ]

[The turtles couldn't find the right time to come ashore to lay their eggs.]

【The albatross hit the cliff in the eternal night.】

[The wolf pack's estrus period is chaotic, leading to a surge in inbreeding. ]

【Humans are not much better! 】

[Although we have electric lights, the melatonin secreted by the pineal gland is still affected by moonlight. ]

[Epidemiological surveys show that human deep sleep decreases by 30% during a full moon.]

[Long-term exposure to a moonless environment can increase the incidence of depression by 200%.]

[Although humans will not become extinct immediately after the moon disappears in the short term. 】

【But life will change dramatically. 】

[We are facing many severe challenges, including the collapse of ecosystems, extreme climate change, food shortages, and the disruption of cultural heritage. ]

[Faced with this hell-level dungeon, the survival time limit given by scientists depends on how the technology tree is selected. ]

[Optimists believe that if humans immediately start "planetary engineering" after the moon disappears. ]

[Using nuclear explosions to simulate tides in artificial ocean basins, launching giant space stations to act as temporary stabilizers of the earth's axis, and then developing vertical agriculture to deal with climate disturbances, it may be possible to survive for 300 years. ]

[In fact, the most likely outcome is. ]

[The first 50 years were supported by stored food and desalinated seawater. In the middle 100 years, the population dropped by 90% due to famine, and the remaining humans retreated to the underground city.]

[The last group of survivors will be wiped out around the 150th year due to crop failure and a major outbreak of mental illness.]

【It can be said that if the moon suddenly disappears. 】

【The fate of mankind is very pessimistic. 】

[Fortunately, based on current scientific knowledge and cosmic observations, the probability of the moon suddenly disappearing is extremely small.]

【The moon has been with the Earth for 45 billion years. 】

[And it will most likely always accompany the Earth forever, until they are swallowed up by the expanding sun.]

……

The video ends here.

Barrages of comments flew out one after another.

"Save the flow: You won't live long."

"Usagi Tsukino can no longer punish you on behalf of the moon."

《The Saiyans on Earth cannot transform into giant apes.》

"It turns out that humans cannot leave the moon? In other words, aliens can easily destroy humans by destroying the moon?"

Is it possible that aliens who can destroy the moon can also easily destroy humans?

"The more I watch, the more I feel that the emergence of life on Earth is simply a miracle!"

"But if the moon disappears, life on Earth will naturally get used to living without it."

"Earth says: I don't care at all, only you humans are worried about the moon."

"Then the question is, if the Earth suddenly disappears, what will happen to the Moon?"

……

And outside the sky.

Eastern Han Dynasty.

Scientist Zhang Heng watched with great interest.

"If...if the moon really disappeared, why would there be such a huge change?"

"I only knew that the sun, moon and stars each have their own orbits, but I never thought that the moon has such a profound impact on the earth."

"The power of the tide is so crucial."

Looking at the scene of surging sea water and flooded city in the picture, Zhang Heng was also thinking.

"If this is true, the earth's axis will be unstable, the seasons will be disrupted, and how will all things in the world cope? Can the instrument I made predict such a disaster?"

And in the late Ming Dynasty.

Although Song Yingxing knew that the moon would not disappear.

But I am also curiously guessing:

"Once the moon disappears, all things will be in chaos."

"Without enough food, people will have trouble getting enough food and clothing. Then won't the winemaking and sugar-making processes that use food as raw materials also come to a standstill?"

"If the moon really disappears, how will agricultural production be carried out at that time?"

"Thinking about it, I feel that there is actually a lot that can be said and done." (End of this chapter)