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Although infinity is a rather illusory and abstract concept, and it is quite taboo in physics to use any definition of "infinite", it is still a very interesting question. Let's not talk about "infinitely long" ladders for now. Perhaps it is more acceptable to use "long enough".
Can we use an infinitely long ladder to leave the earth without reaching the first cosmic speed?
05/22
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Generally speaking, in the weightless environment of space, water should float in the air and assume a spherical shape, as shown in the picture below. However, during the Shenzhou 13 space lecture, a photo of a water cup caused some confusion. From the picture, it can be seen tha
Why doesn’t the water on the space station float out of the cup?
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In 1992, Neal Stephenson constructed a virtual world parallel to the real world, the Metaverse, in his science fiction novel "Snow Crash". Since then, although the concept of the metaverse has not left the public eye, it has not been widely paid attention to and accepted by peopl
Ethical Thoughts on the "Metaverse"
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⇩ ⇩ ⇩ ⇩. More biolighting information can be found in the biolighting demonstration area in Hall 4.2, Area 4.2 of GILE2022A. Click on the "link" to get exhibition tickets.
GILE2022 | Authoritative celebrities give heavy support to explore new trends in bio-lighting
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The 6,000-meter deep sea is a world that is difficult for humans to reach. Some scientists once said that compared with the detection of the deep sea world, space exploration may be simpler. The deep sea is always deep and mysterious. During the Cold War between the United States
2.53 meters long! Strange fish found 2,000 meters deep in Japan, looks fierce: Experts think it is unusual
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As a field closely related to people, water environment has always been the focus of great attention. Water quality monitoring instruments serve as a "pioneer" in water environment management. With the rapid development of advanced technologies such as the Internet of Things, COD
Manganese method COD meter - ensuring the safety of water environment
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Only three scientists worldwide have received this honor. Yuan Daoxian, a professor at the School of Geographical Sciences of Southwest University, is among them. He is a famous geologist, hydrogeologist and karstologist.
There are only three in the world, and the Chinese are among them
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CMP is a planarization process that is carried out by chemical and mechanical effects. It preferentially removes the concave and convex parts on the surface to make it a surface with consistent height differences. It can effectively obtain an ultra-smooth surface. Its polishing p
The unspeakable secrets of fumed silica and CMP chemical mechanical polishing (1)
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To put it simply: the speed of light is 300,000 kilometers per second, which is indeed very fast, but light does not require any power to reach the speed of light, and there is no acceleration process. To put it bluntly, light is "born" at the speed of light, and it must be the s
The speed of light reaches 300,000 kilometers per second. It is so fast, what is the power?
05/21
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Click to read the relevant answers. The reasons are nothing more than: high academic pressure, low employment rate, too bald to engage in scientific research in the laboratory, etc., which has led to endless voices in society "dissuading people from studying biology".
Yale Ph.D.: This major has deceived me for fifteen years, and finally I found that I made a profit
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Through this event, the path from scientific research to industrial application, and from laboratory to clinical practice has been further opened. At the Molecular Diagnostics Forum on June 24, Xu Xiaonan, founder of Dapu Biotech, gave a sharing titled "Searching for Needles in t
Dapu Biotech: Constructing the underlying technology of droplet microfluidics to create industrial-level solutions for biopharmaceuticals
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The L'Oréal Corporate Foundation and UNESCO held a grand ceremony for the "World's Outstanding Female Scientists Achievement Award" on June 23 in Paris, France. Hu Hailan, dean of the School of Brain Science and Brain Medicine at Zhejiang University in China, has become the 2022
TOPHER|Conversation with Hu Hailan: Female scientists should not be labeled
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According to measurements, the water content of aquatic plants is as high as 98%, the water content of herbaceous plants is 70~80%, the water content of woody plants is 40~50%, and the water content of plants in desert areas is only 6%.
Do you know what plant is called the "nine-death resurrector"?
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Are UFOs "getting together" in 2022? Indeed, there has been a lot of discussion on this issue this year, including the issue of suspicious signals detected by China’s Sky Eye, which we just introduced. Many people say that it may be related to extraterrestrial life.
"Mysterious light beams" appear in many provinces in my country! Citizen: It disappeared a minute ago, what could it be?
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In her research, she found a brain area in the thalamus that could improve movement and depression-like symptoms of Parkinson's disease by regulating different types of neurons in this brain area.
MIT postdoc reveals new target for Parkinson's treatment, expected to be translated into primates
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"China wants to occupy the moon" - NASA Administrator Nelson's accusation against China in an exclusive interview with Germany's Bild newspaper became an international joke this weekend. Some foreign media also quoted his words with a strong sense of irony: For example, an articl
It became an international joke! What is the origin of the man who said "China wants to occupy the moon"?
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Is the person in the middle really over 40 years old? Aben, a member of the princess gang of the variety show "Model Lollipop", has been dating for eight years on and off, and Aaron Yan is rumored to be in the palace.
He was clearly top-notch back then, so why did he become so confused?
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Food is the most important thing for people. No matter how old you are, eating is the most important thing. Although middle-aged and elderly people with degraded body functions have smaller appetites as they get older, they are sometimes as greedy as children.
Remind middle-aged and elderly people: If you don’t have money, don’t eat these three foods if you can. They are difficult to digest and are harmful to the body.
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As a veteran player of domestic martial arts games, how much we miss the world around 2000: "Sword of Immortality" and "Xuanyuan Sword" have become the martial arts enlightenment games for many domestic players, and the ARPG non-turn gameplay of "New Swordsman Love" is amazing. I
Are domestic martial arts games dead? Hope is still there! There are still two of the four great masters, Jin Gu, Liang Wen and others contending.
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Afterimage: UCal is optimistic, this is how TP is used, face-to-face fast passing is the way to go! Regarding the BLG team's loss to TT, I believe players who have watched the game will laugh until their stomach hurts. To be honest, the two teams did not have a strong competition
Face to face quick pass? Uzi looks at the icon in situ TP: BLG should study where to travel, the vacation is quite long.
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It is difficult to make games, and it is even harder to make independent games. This should be a consensus in the entire industry. As the game industry continues to develop, although there are many well-received and popular domestic games such as "Taiwu Scroll" and "The Great Imm
Their families don’t understand, how do people who sell their houses, make games, and make solo games stick to their dreams?
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In 2021, long video platforms have encountered many obstacles. In 2022, Station B took the stance of accomplishing all the results in one battle, working hard in various content tracks, and aggressively invaded long videos.
Station B will focus on long-form videos in 2022, which is worth looking forward to
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