Why install a ball on the roof? Surprisingly, so many people don't know
Audit experts:Luo HuiqianAssociate Researcher, Institute of Physics, Chinese Academy of SciencesDo you have any friends like me? Every time I look at the scenery on the rooftop, my attention is attracted by the constantly rotating metal balls on the roof. Are everyone curious about these metal balls that frequently appear on rooftops or on the roofs of factories? What are these round and rolling guys used for, and why do they always appear on the roof?Today, let me take you all to understand the past and present lives of these little things...
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100000 years ago, there were at least 6 species of humans on Earth, why were we the only ones left in the end?
The development of human civilization has always been the focus of scientists' research, but in fact, why humans emerged has also been a headache for scientists from ancient to modern times, because regardless of the level of analysis, the birth of humans is too bizarre.To be aware of the vastness of the universe, the emergence of life on Earth alone, and even the evolution of highly intelligent animals like humans, raises doubts about whether our birth was a masterpiece of the Creator...
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Will new energy vehicles completely replace fuel powered vehicles? The owner of the car repair shop roast that he was going to die
A few days ago, I went to sit with a friend who was doing maintenance for a while, but it's been a long time. He said that business is becoming increasingly difficult this year and is considering whether to seek transformation in the future...
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Four phones that are close to "perfect" in 2023, with strong full performance and reasonable key prices
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The world's first frozen person: paid 50 years in advance, originally scheduled to be awakened in 2017. Wake up?
In science fiction, there is a well-known concept: 'human hibernation'.For example, during long-distance interstellar travel, in order to avoid people dying of old age before reaching the destination...
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Russian mathematical genius: claimed that parallel lines can intersect, but was questioned and ended in frustration, which was confirmed 12 years later
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Jack Ma invested 24 billion yuan, JD.com invested 32 billion yuan, Huawei settled here, and "Second Shenzhen" is about to be born?
Since the reform and opening up, some coastal cities have developed rapidly, and Shenzhen is one of them.Until today, Shenzhen has become a world-renowned international metropolis and is also known as the "Silicon Valley of China"...
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