14 Fun Facts: Real, Interesting, and Strange Facts You May Have Seen Before
cornea
1. Human eyes also need to breathe, because the cornea has no blood vessels, and 95% of the oxygen needed for metabolism comes from the outside air.
2. Although freshly laid eggs are fresh, they contain carbon dioxide, which affects their taste and makes them less palatable. It is best to let them sit for about a week before eating them.
The fibers in bulletproof vests are not only extremely strong, but also highly heat-resistant, which protects the body from burns caused by the high temperatures of bullets.
School of fish
4. Many fish cannot drink water directly when they feel thirsty, but obtain the water their bodies need by eating food.
5. Like many animals, kangaroos will regurgitate the food they have already eaten and then eat it again, so that the nutrients in the food can be fully absorbed by their bodies.
6. Some people can bend their thumbs in the direction of their thumbs because of the distal joint inside the thumb, and they will not feel any pain or damage to their fingers.
sense of smell
7. Almost all insects have their olfactory receptors located on their antennae, which gives them a sensitive sense of smell despite not having a nose.
8. Hair contains more than 30 kinds of metallic elements, including gold. However, the proportion of gold in hair is very low and it is impossible to extract it.
9. In Finland, there is a competition where the winner carries their wife on their back. The winner receives a beer equal to the weight of their wife, and it is said that many people participate every year.
brain
10. There is an interesting book called "Dictionary of Human Stupidity," which details 263 kinds of stupid behavior in human society, and the last item on the list is to buy this book.
Like geckos, snails have regenerative abilities; if you cut off one of a snail's tentacles, a new one will grow back in a short time.
12. "Paper with writing on it must not be wiped." This rule remained in place until the Sui and Tang dynasties because paper was still a relatively precious item at that time and could not be associated with unclean behavior.
teeth
13. Under normal circumstances, the whiteness of a person's teeth is almost the same as the whiteness of the whites of their eyes.
Fourteen. The reason why washing machines have transparent windows is that when washing machines first appeared, people did not trust them very much, so manufacturers designed windows that allowed people to watch the washing machine running. Later, as washing machines became more common, people also learned that the machine would not damage clothes, so some models removed this design.
1. A postdoctoral fellowship is not a degree.
Postdoctoral fellows refer to those who continue their research at universities or research institutions after graduating with a doctorate. They generally refer to people who conduct research at postdoctoral research stations or postdoctoral research workstations. So, strictly speaking, it is a profession rather than a degree.
2. Guanyin Bodhisattva was originally depicted as male.
Legend has it that Guanyin Bodhisattva statues were mostly male before the Common Era. After being introduced to China, they became popular among women due to the legend of Guanyin saving people from suffering. However, this was considered indecent in feudal times, so Guanyin statues were sculpted with a male body and a female face.
4. Octopus blood is blue.
The color of blood is determined by the elements contained in blood cell proteins. Human and vertebrate blood is red because it contains a large amount of iron-containing hemoglobin.
5. Wine is also a traditional beverage.
Although wine is a foreign alcoholic beverage, China has a history of drinking wine for more than two thousand years. It was introduced to China during the Western Han Dynasty, which is even older than the history of regular script characters.
6. Aloof people
Sometimes we say that someone is aloof, but actually no one is truly aloof. It's just that they're not interested in you. In front of someone they like, they can be as silly as a goofball.
7. You won't lose your teeth when you get old.
Many elderly people have poor dental health, leading to the stereotype that "teeth fall out easily as people get older." However, teeth don't fall out with age; tooth loss is caused by neglecting oral hygiene.
8. An owl's eyes can't move, it can only turn its head.
Although owls have large, seemingly bright eyes, they are actually immobile and can only move their necks. However, their necks are exceptionally flexible, capable of rotating 270 degrees.
9. Weight tends to decrease slightly when the moon is directly overhead.
When the moon is directly overhead, it is at its closest point to us. Because the gravitational pull of the moon minimizes the gravitational pull of the Earth's center on us, our weight will be slightly reduced, but it will be barely noticeable.
10. The brain can only concentrate for a maximum of 25 minutes.
For adults, the brain can only concentrate for a maximum of 25 minutes, so it's advisable to take a break after studying for 30 minutes. Use this time to relax, and then return to studying after 10 minutes for better results.
10 little-known facts that will blow your mind!
1. Postpartum depression is not only a female ailment; studies show that 10% of men also suffer from postpartum depression after the birth of their child!
2. Psychological research shows that when two men are pursuing one woman, the one who is less invested will give up first; while when two women are pursuing one man, the one who is most invested will give up first!
3. Why is it that some people can get up early in the morning even though they both stay up late, while you can sleep until your mom calls you for lunch? Why are some people full of energy all day while you feel sleepy as soon as you finish lunch, even though you both go to bed early and get up early? Actually, it's all determined by genes.
4. Eating an apple is more invigorating than drinking coffee. Apples are rich in sugars, vitamins, trace elements, water-soluble dietary fiber, and organic acids, making them a widely recognized healthy fruit. Furthermore, apples have a naturally pleasant aroma, which can relieve stress and refresh the mind. The abundant boron in apples can also quickly restore a tired brain to a state of alertness. This is why eating an apple is better than drinking a cup of coffee.
5. 11*11=121, 111*111=12321, 1111*1111=1234321, 11111*11111=123454321. How about that? Can you answer this multiplication problem immediately from now on?
6. In our great China, the two-day weekend was only implemented on May 1, 1995! You can imagine how much of a headache it was to go to work before that.
7. The "head" in "abalone with a few heads" refers to the number of abalone in one jin (a unit of weight). Therefore, the smaller the number, the larger the abalone.
9. After you finish having a dream, no matter how clearly you remember it, you can never remember the beginning of the dream.
10. In some countries, escaping from prison is not illegal, such as Germany and Denmark. The prerequisite is that you can get out.
