What is the scientific knowledge around you, what is the scientific knowledge around you

People wear light-colored clothes in summer because they absorb less heat from the sun than dark-colored clothes, so they don't feel too hot when they wear them: people who eat sugar or sweets often tend to spoil their teeth and make themselves fat.

Twin Cities Glass is using a vacuum that cannot transmit sound.

The science around us is as follows:

1. If an asteroid wants to create a catastrophe, it does not have to really "hit" the earth.

In 1908, an asteroid crashed into the Earth's atmosphere and landed in Russia**, and although it disintegrated at an altitude of kilometers away, it still destroyed 800 square miles of Siberian forest with the shock wave of the power of 150 Hiroshima atomic bombs.

2. In ancient times, there were huge dragonflies.

Appearing about 300 million years ago, the giant dragonfly is about the size of a seagull and has wings about 65 centimeters long. Insects usually don't grow to such a large size, and scientists are still looking for reasons why he can grow so big.

3. A million years ago, the day was shorter than it is now because of the moon.

Because of the change in the distance between the Earth and the Moon, the Earth's self-transformation has slowed down. It used to turn very fast, causing the day to become shorter. There were about 385 days in a year, less than 23 hours a day. And this is evidenced by geological evidence.

4. There are almost no sugar substitutes in the world.

Sucralose, the main chemical component of sugar substitutes, was discovered when a scientist asked a colleague to "test the chemical." His colleague listened to the test as a taste, and then found out. He was also quite lucky, but luckily it was only sucralose and not other toxic substances.

First, the mobile phone should be searched and buried away from electromagnetic cards, bank cards, and meal cards.

Second, do not use wet hands or other wet things to directly electrocute.

Third, when washing a white shirt, you can add one or two drops of pure blue ink to the water, and the clothes will appear whiter.

Fourth, ants, ants move, snakes pass, this is a sign of a change in the weather.

There is too much such common sense, and I can't remember much of it, so if you need special common sense, you can go back and ask me.

A dog can distinguish the size and sex of other dogs by smell, and it becomes hostile when it discovers that the other dog is a male dog and is larger than itself.

The manifestations of heat stroke are: body temperature is very high, **dry, sweat can not be discharged at all, pupils are a little narrow, the face is red, and the pulse is very fast.