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It has long been thought that ancient humans moved out of Africa from primarily relatively affluent woodlands along the Mediterranean coast (1, 2). However, a recent work found that this is not the whole picture (3).
Nature | New research finds the hidden "story" of humans' "out of Africa"
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Polypropylene is one of the most widely used types of general plastics. It has the advantages of low density, good rigidity, resistance to flexing, chemical corrosion, and good insulation. Its shortcomings are poor low-temperature impact performance, easy aging, and large molding
Is polypropylene shrinkage difficult to control? What are the influencing factors? "Attached is a table of shrinkage rates of common materials"
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High-end polyolefin - one of the eight new chemical materials, is a polyolefin product with high technical content, high application performance and high market value.
The over-trillion high-end polyethylene industry explodes! Have you seized this new blue ocean market?
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[Plumbing Valve Network News] Valve corrosion is one of the main reasons for valve failure. There are several forms or causes of corrosion, which can be roughly divided into six forms of corrosion. Corrosion is a natural wasteful way of drawing metals into their ores.
How are hotel valves corroded?
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Don’t study eternal life. Eternal life will tie humans to the earth. I know that many people are afraid of death. The body is getting younger and younger, at least the mind is getting younger and younger, and it is getting smarter and smarter. If this thing really happens, then I
The pursuit of immortality will trap humans on earth
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Cockroaches are commonly known as Xiaoqiang, and I believe everyone is familiar with them. Cockroaches are one of the oldest insects on earth, living at the same time as dinosaurs and other ancient creatures. It is even more than 100 million years earlier than the birth of the fi
Should you step on a cockroach if you see one at home?
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Octopus is an invertebrate animal in the ocean, but compared with other earth creatures, octopus has too many unique characteristics, such as certain physiological structures and behavioral characteristics, that even more advanced vertebrates cannot compare with. . Judging from t
It’s too harsh on yourself! After mating, octopuses sometimes eat themselves. Why do they do this?
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Suddenly a warm breeze arrives, followed by a slight summer heat. July 7 ushered in the Xiaoshu solar term. Xiaoshu is the 11th solar term among the twenty-four solar terms and the fifth solar term in summer. "Shu" means hot. Xiaoshu means "little heat". It is not very hot at thi
It’s a slight heat today! The warm wind is coming, the mild summer is coming, and the long summer is at its peak.
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In Chongming, the mouth of the Yangtze River, there is a group of people responsible for a small but important part of this large project - fishing management. July 4th, sunny to cloudy, southeasterly wind of level 4-5 in the Yangtze River waters.
They shouted in the Yangtze River: This matter cannot be done
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01: The largest bird sculpture in the world is located in the southwestern state of India, Kerala. It is 61 meters long, 45.72 meters wide and 21.3 meters high, and is decorated with intricate details.
28 Miracles of Humanity and Nature That Are So Amazing and Depressing
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In the classic Korean drama "Blue Life and Death", there is this sentence: "In my next life, I want to be a tree, so that I can always stay in one place and never leave." From ancient times to the present, trees have always been "rooted in the earth" "The image of "appeared", and
Did you know that trees can walk?
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Close your eyes and imagine that you eat some purple grapes and then your whole body turns purple. Isn't this scary? Of course, such bizarre things don't happen to humans. But Melissa Abramovitz told me that this is exactly what happens in sea caries.
How do sea slugs change color?
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How cold is space, and does it drop to absolute zero? What would happen if you fell in without a spacesuit? While science fiction movies would have us believe that space is very cold — even very cold — space itself is not entirely cold. In fact, it actually has no temperature at
How cold is space? The physics behind the temperature of the universe
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[CNMO News] Weight loss has always been a hot topic among people. Some people eat too much and don’t gain weight, while some people gain weight even if they drink water. Therefore, losing weight also troubles many people. They have tried various methods but still have no effect.
It may be possible to eat dry without gaining weight. German scientists discovered signaling molecules that promote fat burning
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A bus-sized planet will pass close to Earth today, Thursday, July 7, passing within just 56,000 miles (90,000 kilometers), or 23 percent of the average distance between Earth and the moon. The asteroid, called 2022 NF, is expected to pass safely by our planet, according to calcul
Scientists detect a bus-sized planet that will approach Earth tonight
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In the eyes of many people, "alien" and "alien civilization" are synonymous with advanced civilization, and their civilization is much higher than human civilization. In many science fiction novels and movies, this point is particularly prominent. Aliens always appear to be omnip
Fears that aliens visiting Earth will wipe out human civilization may be unfounded
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According to multiple foreign media reports, on July 6, local time, FBI Director Christopher Wray and MI5 Director Ken McCallum held a joint press conference in London.
Is China "stealing" Western advanced technology? It’s hard to see that China is leading in science and technology, but Europe and the United States are pouring dirty water again.
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Capricorns are very averse to beating around the bush, they are strong-willed, very insightful, good at using their free time, introverted, accustomed to hiding their thoughts in their hearts, and will remain silent if they have conflicts.
Next week, Monday 1, the four major zodiac signs will take off in their careers, achieve financial freedom, and soar to the sky.
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Skirt is a must-have item in a woman's wardrobe, because it can best highlight femininity. It is not only fashionable and western-style, but also suitable for some very important occasions. You can prepare one in advance for emergencies.
You Xiaogang’s darling wife is 30 years younger. She is so beautiful. She is 40 years old and wears a lace dress. She is exquisite and slim. She steals all the shots of her husband.
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Among the many colors, Chinese red seems to be the most eye-catching color. Its existence can quickly make you become a C-position among the crowd, without any pickiness about age. And when it is combined with a skirt, different styles and designs will give it a completely differ
Liu Xiaoqing and Brigitte Lin wear red dresses together. One is sexy and the other is elegant. Growing old naturally is also a kind of beauty.
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Suspender skirts have a high appearance rate in summer. Its advantage is that it exposes a larger area, which can show off the wearer's shoulder, neck, skin and arm lines, thus bringing a refreshing and comfortable feeling, and at the same time, it can also help you show off. It
Lingling Chu is really good at pretending to be young. She is charming and sweet in a purple dress with suspenders. She looks like a father and daughter in the same frame as her rich husband.
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The most difficult part of the body to take care of and maintain is the face. Many people can still maintain a good figure as they get older, and they are no different from their younger selves. However, as time goes by, the appearance of Fine lines, spots, bags under the eyes an
Cyndi Wang’s face also collapsed! Wearing a one-shoulder printed skirt is so sweet, but your face is completely lost
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