silver ore

Firstly, the discovery and use of silver in human history occurred later than that of gold, so for a period of time, the price of silver was higher than that of gold.

2. In many parts of the world, there are some strange customs. For example, in some places, you can't smile when taking a taxi, because smiling while taking a taxi is considered unfriendly.

Third, psychologists believe that people only develop adult memory abilities around the age of 5-6, and their memory before that is almost blank; this period of memory is also known as infant memory.

binge-watching

Fourth, girls are more likely to get into dramas because they have a much stronger ability to empathize than boys and are more likely to feel the same way.

5. When cotton candy first appeared, the entire process of making cotton candy was done manually. Later, a dentist developed a machine to make cotton candy.

6. The reason why it is difficult to do push-ups is that in order to complete a standard push-up, the arms have to bear about 65% of the body weight.

delicacies

The seventh category, "Mountain Delicacies and Seafood," specifically refers to the "Upper Eight Delicacies," "Middle Eight Delicacies," and "Lower Eight Delicacies," comprising a total of 24 kinds of food.

8. Although humans possess intelligence, the human brain is not the largest. The human brain is only the largest when combined with body size. The largest brain in the world is that of the sperm whale.

9. There are many capillaries in front of the optic nerve at the back of the eye. When we look at things, many of these capillaries will block part of the image, but when the brain receives these images, it will automatically fill in the blocked parts.

Choosing a spouse

11. An experiment showed that when choosing a partner, people tend to prefer those who are more interesting than themselves, but not as intelligent.

11. Research has shown that people sleep best during the new moon, while sleep deteriorates significantly during the full moon.

12. Sharks can vomit their stomachs. Usually, when a shark feels indigestion, it will vomit its stomach to "wash away" the indigestible particles, animal mucus, and parasites in its stomach before swallowing it back into its body.

Say it three times

Thirteen. "Say important things three times." This phrase first appeared in the philosopher Nietzsche's "Beyond Good and Evil."

14. When a person judges and identifies a route on their own, the hippocampus in the brain is in an active state. However, if one relies on navigation for a long time, the original function of the hippocampus will be idle, and over time one will become a true directionally challenged person.