Science
The real "guardian" of mankind, if it weren't for him on duty 38 years ago, civilization may have disappeared
Since the birth of nuclear weapons, mankind has known that it is very simple to destroy civilization. Just a 20,000-ton atomic bomb can raze Hiroshima to the ground. What if it reaches 100,000 tons? What will be the consequences? And even after the explosion, radiation will continue to harm living things and the environment. After being attacked by radiation, there will be serious physical changes, or diseases, and death is an inescapable fact.
By sayre laylah4 years ago in Earth
21 cool facts: It seems interesting, but there are few places to use it
American scientists have cultivated genetically modified mosquitoes in the laboratory and released 750 million genetically modified mosquitoes in the test area, allowing these mosquitoes to mate with wild mosquitoes and pass on the genetic defects to their offspring, thus effectively controlling the number of mosquitoes.
By sayre laylah4 years ago in Earth
Small cells make a big difference: stem cell therapy for stroke
"Cerebral stroke", also known as "stroke" or "cerebrovascular accident", is an acute cerebrovascular disease, which is caused by sudden rupture of blood vessels in the brain or the inability of blood to flow into the brain due to vascular blockage. A group of diseases, divided into ischemic and hemorrhagic stroke. The incidence of ischemic stroke is higher than that of hemorrhagic stroke, accounting for 60% to 70% of the total number of strokes. Occlusion and stenosis of the internal carotid artery and vertebral artery can cause ischemic stroke, and most people are over 40 years old, more men than women, and severe cases can lead to death. Hemorrhagic stroke has a higher mortality rate. Stroke has the characteristics of high morbidity, high mortality and high disability rate.
By sayre laylah4 years ago in Earth
At 11:20, the Long March 6 carrier rocket was successfully launched, sending 9 satellites into space at the same time
What everyone is most concerned about in the past two days is the launch of our Tianhe core module. The official choice has not yet been clearly stated at which time of the two days, but it is obviously long-awaited for the Chinese people. After all, the launch of the core module and the The launch of the cargo spacecraft in May and the launch of the manned spacecraft in June will be docked in the future space battle, and our 3 astronauts will enter the space station in the future, and they will stay for at least 4 to 5 months, which is It is unprecedented, so for the Chinese people, this year's China Aerospace is destined to be an extraordinary year! Of course, whether it is the launch of the core module, the launch of a cargo spacecraft or the launch of a manned spacecraft, it all depends on the launch vehicle, and we obviously have to rely on the Long March series of rockets to complete it! And when we are all looking forward to the launch of the core module, we saw that the Russian carrier rocket completed the feat of 36 stars on the 26th, which is really admirable!
By sayre laylah4 years ago in Earth
Have humans really succeeded in domesticating cats? Don't get too excited, the cat may just want a lap
There is a saying to describe the difference between cats and dogs: if you provide dogs with food, shelter, and protect them every day, then in the eyes of dogs, you must be God, otherwise how can you be so good to yourself. But the cat doesn't think so. It feels that it must be God, otherwise how can humans be so good to themselves?
By sayre laylah4 years ago in Earth
Why do humans lose hair? But the hair and private parts are still there, why?
Introduction: Now people say that humans are hairless is not a correct statement. It is said that the density of hair and the number of hair follicles in our body alone, the hair of our body should be almost the same as that of chimpanzees, but our hair is relatively Soft hair, not the relatively hard hair of chimpanzees, and the function of our fine hair is different from that of chimpanzee hair. Human hair is used to regulate the body temperature, however many hairy Animals do not have this function. For example, puppies use their tongues to dissipate heat, not through the long hair on their bodies.
By sayre laylah4 years ago in Earth
Electric eel: Known as "high-voltage line in water", it electrocuted several piranhas at once
If you want to gain a firm foothold in the fierce competition in the biological chain market, each microorganism must continuously adjust itself in the whole process of adapting to the new environment. Many animals have evolved their own supernatural abilities in order to better capture food ingredients. And then to the "top".
By daron mychal4 years ago in Earth
Is human lifespan determined at birth? Study shows: Basic lifespan depends on genetics
The topic of lifespan has been a topic of common concern since ancient times. Although the average lifespan of human beings has been extended to a certain extent with the continuous progress of medical care, in natural conditions, the length of lifespan of different people is actually different. There is still a big difference. It is for this reason that in order to completely uncover the hidden secrets of human lifespan, scientists are also working hard to study.
By sayre laylah4 years ago in Earth
Rare photo: Snake eel emerges from the belly of the vulture, but it flies calmly, what's the situation?
"Natural selection for the survival of the fittest", whether it is human society or nature, competition is cruel. All species in nature and within species have to compete with each other, and only the most powerful can win and finally be selected to stay. After the defeat in the Sino-Japanese War in the late Qing Dynasty, the Chinese nation finally realized that standing in the forest of the world had reached the most critical juncture. A group of people of insight also began to open their eyes to see the world, and were the first to spread new ideas. Huxley's "Evolution and Ethics" had a huge impact on society after being translated by translator Yan Fu. The concept of "natural selection, survival of the fittest" greatly shocked people's hearts and greatly promoted the enlightenment of thinking at that time. Even the familiar Hu Shi was named because he was deeply shocked after reading this book, so he took the word "Shi" as his name.
By sayre laylah4 years ago in Earth
Stop looking for extraterrestrial civilizations, there is one in the earth, scientists: In front of it, humans are advanced civilizations
In the wilderness of the northeastern region of Brazil, there is a huge colony of white ants. It is estimated that it existed 3000 to 800 years ago, and it is still in use and construction until now, with a total area of about 228,000 square kilometers. , there are more than 200 million mounds that can be seen on the surface, and can even be photographed in outer space. Coincidentally, a giant red ant colony appeared on the seaside of Hokkaido, which contains more than 300 million worker ants , 1.08 million queens, they live in 45,000 interconnected crypts, crypts spread over an area of 27,000 square kilometers.
By sayre laylah4 years ago in Earth
