The degree of pain felt by each person is different, even very different. This difference may be related to the extinct Neanderthals, because people with…

　　The sky was gloomy, and there was a slight rain. The raindrops hit the lake, causing slight ripples; hitting the weeds on the roadside, colorless…

　　For a long time, the mad dog wave was just a legend of sailors. It was only in the last few decades that the existence…

　　Study Calculus 　　students said to me: “I have carefully studied advanced mathematics, calculus and linear algebra, found a lot of interesting places.” 　　I asked: “You…

　　There are approximately 49 billion bubbles in a bottle of champagne, and a large number of bubbles have to burst out in an instant. What…

　　A heavy rain is coming, people are hiding under the eaves, some birds and beasts rush into their nests, and some birds and beasts are…