Popularize scientific and cultural knowledge
Culture is, or should be, the study and pursuit of perfection; and the perfection pursued by culture takes beauty and wisdom as the main quality. Arnold in the world of science, there are always endless breakthroughs and innovations. When people's academic theories are used as the basis and their own understanding and ideas are applied, sparks will be generated in the collision of thinking. This is especially true in academia. Every theory, whether physics or mathematics, has undergone a lot of tribulations before it can be confirmed. in mathematics, there is such a definition for parallel lines: "two lines in the same plane that never intersect are called parallel lines", which has been defined by countless scholars
In 1590, Jesuit priest Acosta proposed that high altitude would cause discomfort to the human body, because the human body needed to breathe a lot of air, which was "very thin and weak". In the process of continuously challenging the flight altitude limit, people find that the influence of high altitude is not only "discomfort", but also the human body's disability and death caused by hypoxia environment. For the vast majority of fighters who can only stay for a short time at 18000 meters and above, the full compression suit is also too cumbersome to fly at the maximum altitude.
Human society has developed for many years, and has become the most powerful creature on earth. It seems that in order to show that animals have been slaughtered, people have developed into animals. But even after many years, many animals have been found to be untreatable. Through today's article, Xiaobian has prepared nine kinds of animals that can't be really domesticated even though they have developed for many years. Zebra zebra is one of the most amazing animals that we have never domesticated. In fact, in a sense, this is very strange, after all, horses and donkeys have been tamed by humans for many years, while zebras
Lindy Lumsden is not an astronomer, but in August and September of 2009, she watched the stars anxiously every night. Four weeks ago, she was finally given administrative permission to embark on a long voyage to Australia's overseas territory of Christmas Island. This is a lonely island, with intoxicating coconut trees and red crab migration. For most Australians, including Lindy, the Christmas Island, which is composed of almost all Chinese, even has a trace of exotic flavor. However, Lindy is not interested in these things. She shoulders the important mission of being a habitat only
In Africa, there are the longest river in the world, the Nile River, and the largest desert in the world, and the desert area of Africa accounts for about one third of the whole state. In addition to the Sahara desert, the famous deserts include the Libya desert, the laibuana desert, the obari desert, and the namibi desert. The namibi desert, located in the largest nambi nuovov National Park in Africa, is also considered to be the oldest desert in the world. It was formed 80 million years ago. In Nama language, "Nambu" means "barren land". However, in this barren land, there is a strange plant called "centenaria". 186
Introduction love green, protect the environment; thrifty, cherish resources. ——Anonymous there are many countries in the world that have deserts, and most of them are facing the problem of deserts. Once this problem is mentioned, all countries will feel very worried and worried. You know, in the desert, plants are very difficult to survive, mainly because the environment is too bad, and there is not enough water, so few plants can come down. There is no trace of life in the endless desert, which shows that there are serious environmental problems in the desert, such as sandstorms, etc. Although the state has made reasonable regulations on this
Do you have the right napkins? The difference between tissue paper and toilet paper is so big that it's troublesome to use it wrong! small paper towel can have university to ask, this time all know, don't look regret! different tissues, different uses in our daily life, we often use tissue paper, toilet paper, wet tissue paper, kitchen paper, etc., each of which has different uses and cannot replace each other. Facial tissue paper: facial tissue paper facial tissue paper and napkin paper are specially used to clean the face, soft and close to the skin, with the highest hygiene requirements. It is safer to wipe the mouth and face. in addition, after soaking, the tissue paper has good toughness, is not easy to break and wipe sweat
I believe you must have had this kind of experience. When you are talking to someone in a certain place, you suddenly feel that the current scene has happened in a certain period of time in the past, and you have a strange sense of familiarity. However, after the event, no matter how much I think about it, I still can't recall when I experienced it, which makes people feel a kind of space-time disorder. why do we suddenly feel "deja vu" about a scene? In the past, many friends have reflected with me and even consulted me, saying whether this is caused by functional problems in some parts of the human body. or does this situation belong to what people call "psychic phenomenon"
Blood viscosity is a precursor of thrombosis. If the following four signals appear during sleep, the blood viscosity in the body may be high. Especially the middle-aged and old people, we must be careful! There are four "strange images" with a lot of blood garbage, and one of them should also be checked: 1. Being held awake during sleep having difficulty breathing during sleep, thus being choked up in sleep, may also be accompanied by dizziness, unconsciousness of the brain and headache. This phenomenon may be related to blood viscosity, and of course, other factors are not excluded. if there is thrombosis in the body, it will increase the incidence of cerebral infarction, myocardial infarction, pulmonary embolism and other diseases, and the mortality rate is very high. 2. Drooling when sleeping
The US Dana Farber Cancer Institute bakouny and others reported that the covid-19 pandemic has affected almost all aspects of cancer treatment and research, from bringing new risks to patients to interrupting the continuity of treatment and research. While covid-19 makes the treatment of cancer patients more complex, it also inspires innovative solutions to meet the challenges of clinical medicine. (cancer cell. 2020 doi: 10.1016 / j.ccell. 2020.09.018) research progress on the causes of increased risk of cancer patients
There was a mummy in the National Sculpture Museum in Munich, Germany. Today, there are more than 1000 such mummies in the world, but only 100 remain on the corresponding mummies. The mummies of the other 900 portraits are unknown. The reason why archaeologists chose to restore the child's mummy is that it is the "old man" in the museum. Judging from the restored mummy, the ancient Egyptians do have black characteristics, but the aesthetic has been Europeanized. After all, they were ruled by the Greeks and Romans for so long that they still thought the master looked good. So even the portraits after death were imitated by European people.
From the perspective of hemorrhoids, another 10 hemorrhoids are obviously exaggerated by people. Hemorrhoids is not a serious disease, but it makes people "uneasy" and seriously affects our life. Hemorrhoids most can think of is stool with blood. In fact, this is only a manifestation of internal hemorrhoids, external hemorrhoids, mixed hemorrhoids, in which external hemorrhoids are mainly manifested as anal discomfort, unclean moisture, itching, etc. Improving anal movement can promote the blood circulation of anal part and increase the strength of sphincter.
Prevention of arteriosclerosis is the primary prevention of arteriosclerosis. It is mainly aimed at the risk factors of arteriosclerosis for preventive treatment. The main risk factors are: 2. Dyslipidemia is the most important risk factor of arteriosclerosis. Clinical application of statins can well control blood lipid and delay arteriosclerosis. 4. Smoking and passive smoking, smoking can increase the incidence of this disease by 2-6 times. In recent years, it is advocated to prohibit smoking in public places. 5. It is suggested that the fasting blood glucose should be controlled at 7 mmol / L.
Texas Environmental Quality Commission issued an emergency notice saying that "brain eating insects" might be found in the water supply system of a county in the southeast of the state, and issued a warning to more than ten areas of the state, advising people to "do not use water"! The Texas Environmental Quality Commission issued a warning on social media on the same day that the water supply system of brazosport Water Bureau may have "Neri flexneri". "It is not clear how long the measures will take." Its water quality can also be recommended by the State Council for drinking water, but not for flushing water within the range of the toilet.
It can be said that the role played by the earth's living things in the ecosystem can not be replaced by human beings. For Australia, it can be said that whale stranding has occurred in the past, but this one may be a more serious grounding event in Australia's history, and it is one of the largest strandings in the world. The area where the whale stranding occurred is located in the west coast of Tasmania, Australia. According to whale behavior experts, this may be related to the habits of whales. When some whales run aground, this highly social creature will try to reunite with their "family members" and "friends", thus causing more whales to land.
One of the advantages of tea drinking in the United States is that they have just learned to drink tea and have a bad effect on atrial fibrillation. Because I treat atrial fibrillation, premature beat and other arrhythmias every day. I have seen a large number of patients. They are induced by drinking coffee, and drinking coffee can aggravate it. So, in this sense, I feel flustered when I drink coffee. It may not be enough to say that it is heart disease, but it shows that the heart is not so strong.
This year's Mid Autumn Festival is coming, and it's time to enjoy the moon. According to astronomical experts, this year's mid autumn moon has 16 circles on the fifteenth day of the lunar month, and the roundest moment occurs at 5:05 a.m. on October 2 (August 16 of the lunar calendar). Shi Zhicheng, member of the Chinese Astronomical Society and director of the Tianjin astronomical society, said that on the first day of the lunar new year, we can not see the moon, which is called "new moon", also known as "new moon"; around the 15th day of the lunar calendar, we can see a round moon, called "full moon", also known as "Wang". According to the lunar calendar, "Shuo" is located on this day
Recently, the research team of Professor Zhu Huanzhang from the State Key Laboratory of genetic engineering of Fudan University published a research paper entitled "PEBP1 suppress HIV transcription and induce latency by inactivating MAPK / NF - κ B signaling" online in the international famous academic journal emboreports. The researchers also found that when pepp1 was induced by EGCG, it inhibited nuclear translocation NF - κ B, which in turn inhibited the reactivation of latent HIV viruses isolated from the primary CD4 + T cells of HIV positive patients receiving antiretroviral therapy.
Where to learn greenhouse planting technology? Some novices want to do greenhouse planting, there is such trouble: they have land, but they have no greenhouse planting technology and experience, so where to learn reliable and professional greenhouse planting technology? In addition, what you need to pay attention to is that the local government still supports the greenhouse vegetable planting. You'd better make use of the government's resources to consult about the details of greenhouse planting technology, subsidies, etc., so that you can analyze your own situation and see whether it is suitable for greenhouse vegetable planting projects.
Since the folk potted fruits and vegetables were planted indoors, this trend has spread rapidly in the circle. For a long time, Xiaohua was worried about what kind of plants to cultivate. As the name suggests, the branches of multicolored peppers are hung with round heads of different colors and colors. They look tender and lovely. Now let's take a look at how to take care of the colorful pepper on the balcony! Xiaohua thinks that, compared with ordinary pepper, colorful pepper is really a kind of potted vegetable with high appearance value. It is no wonder that people prefer to cultivate it as ornamental plants in life.