世界上最残忍的29个冷知识 请告诉你的孩子
"In这10个令人细思极恐的冷知识,99 的人都不知道
credible Cold Knowledge That Will Leave You Astonished!" Did you know that the coldest temperature ever recorded on Earth was minus 12
8.6 degrees Fahrenheit? This bone-chilling record was set on July 21, 1983, in Antarctica at a research station called Vostok, which is known for its extreme weather conditions. However, the extreme cold is not limited to the Earth, it extends beyond our planet as well. In fact, the coldest place in the entire universe has been measured by scientists to be a region of space called the Boomerang Nebula. Its temperature is a freezing minus 45
7.6 degrees Fahrenheit, which is just 1 degree above absolute zero (the theoretical limit of lowest temperature possible). But how is such a low temperature even possible, and how is it measured? The answer lies in the properties of gases, particularly those that exist in space. At extremely low temperatures, gases turn into their atomic or molecular form and lose the energy that causes them to move and collide. This lack of movement causes the gases to lose any heat they may have had and to fall into a state called Bose-Einstein condensate, which is what happens at absolute zero. The discovery of Bose-Einstein condensate in 1995 was a major milestone in physics, and it led to the creation of new materials such as superconductors and atom lasers. But the Boomerang Nebula is not the only example of this phenomenon; scientists have created such a condensate on Earth as well, in a laboratory by cooling down atoms of rubidium to near absolute zero. Another intriguing fact about extreme cold is the persistence of "eternal frost" in parts of Siberia. There are pockets of permafrost in Siberia that have remained frozen for thousands of years, even during the most recent global warming period. This permafrost is so deeply frozen that it contains the corpses of ancient animals like woolly mammoths that died during the last Ice Age. Moreover, the extreme cold can also have surprising effects on the human body. In some cases, exposure to extreme cold can induce a state of hypothermia, where the body's core temperature drops dangerously low. However, recent research has shown that exposure to cold temperatures can also have beneficial effects on the body, such as boosting the immune system, reducing inflammation, and improving mental health. In conclusion, the incredible cold knowledge that we have explored is a testament to the power and unpredictability of nature. Whether it is the eternal frost of Siberia or the Bose-Einstein condensate of deep space, the extremes of cold continue to challenge our understanding of the universe and its phenomena.
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