Click on the top to follow [Douban things] Wechat's article comes from Douban netizen Meng Han Shixiong's diary, "eliminating acne is not so difficult and not so simple, a little experience of life."
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9 billion light-years away in the deep sky, there is an epic cosmic waltz.
Two supermassive black holes circle each other in a two-year cycle.
Both of these giant bodies are hundreds of millions of times more massive than the sun, and the distance between them is about 50 times that between the sun and Pluto.
For most of us, finding the way is not a particularly difficult thing. We humans are excellent navigators who can cope well in different environments.
But the navigation skills of insects may be better than ours, or even quite amazing.
For example, ants living in the salt fields of the Sahara can travel more than a thousand meters and know the relationship between them and their nests at any time during the journey.
Why does the process that takes place in nature develop in only one direction?
For example, why can't we heat up a cup of coffee in the refrigerator or stop a drop of ink from spreading spontaneously in the water?
If a piece of copper falls into a glass of water, nothing happens, but if a piece of sodium falls into the water, there will be a violent chemical reaction that produces enough heat to melt the sodium.
According to statistics, when people are awake, they spend about 46.9% of their time thinking about something other than what they are doing, the so-called mind-wandering (Mind Wa.
