What does cold knowledge mean?

The explanation of cold knowledge is as follows:

Cold knowledge is trivial and complicated things or knowledge, which may be interesting and are always around us in our lives, but rarely Few people will pay attention.

The trivia may seem a bit strange, but once you get closer, you will feel that the winding path leads to a quiet place and you will suddenly feel enlightened. The so-called "cold knowledge" refers to useful knowledge that is ignored by people. Cold knowledge is all around us all the time. It is complex, numerous and fragmented. It may be interesting, but it is easy for people to ignore it or not understand it well. Just like "cold jokes" are a kind of alternative humor, cold knowledge is actually very useful and more attractive. This knowledge is fresh and fun, which not only increases your knowledge but also broadens your horizons.

Trivia:

1. Why should the injection be given to the buttocks?

In medicine, it is called intramuscular injection. The drug is injected into the muscle, and then slowly participates in the blood circulation, and then exerts its effect. And many drugs cannot directly enter the blood vessels, otherwise they will cause harm to the human body. Threat to life.

2. What’s the matter with biting your tongue and committing suicide?

The most common way to commit suicide by biting your tongue is to bite off the tongue from the base with your teeth. This is of course very painful, but it will not cause immediate death. In addition, people who deliberately commit suicide by biting their tongues generally have strong willpower and a strong ability to endure pain.

3. Will people die if they run out of energy?

The semen will be depleted after continuous ejaculation in a short period of time, but people will not die from it. However, excessive indulgence will cause physical exhaustion and discomfort.

4. Why does your stomach growl when you are hungry?

When you suddenly smell the aroma of food or see attractive food, your mouth will automatically secrete saliva, and your stomach will begin to secrete gastric acid, which will quickly digest the food in the stomach. Your stomach will growl due to hunger.

5. Why do some people like to shake their legs?

The behavior of leg shaking can be divided into two situations: one is daily leg shaking, which is a habit that people unconsciously develop in life; the other is diseased leg shaking, even if the owner of the leg wants to Stop, but can't control his leg shaking behavior.