finger

One. A human finger can feel objects at the nanometer scale and vibrations with an amplitude of only 0.00002 millimeters.

2. You can't bring jelly on a plane because the air pressure inside the plane during flight can cause the jelly to expand or even burst.

Third, pangolins are toothless animals, and none of the eight species of pangolins in the world have teeth. Like birds, they rely on their stomachs to chew their food.

Fourthly, people now use "Prince Charming" to describe a girl's ideal man who is like a prince, but originally, "Prince Charming" referred to "foolish men" who rode white horses and followed behind noblewomen to learn etiquette.

Headache

Fifth, research has found that the different body structures of women and men make women about three times more likely to have headaches than men.

6. Studies have shown that people who have long-term or frequent gum disease are twice as likely to suffer from stroke or heart disease as those without.

7. Milk can supplement calcium, but most dark green vegetables actually contain just as much calcium as milk. However, the calcium absorption rate of dark green vegetables is slightly lower, so you need to eat more vegetables if you want to supplement calcium through vegetables.

8. Bee hives are hexagonal. Through precise calculations, it has been found that this hexagonal shape allows bees to create the largest number of hexagonal "homes" in a limited space with the least amount of raw materials.

Close your eyes

9. In a person's life, the eyes are closed for about 40% of the time.

10. "If I and your mother fell into the water, who would you save first?" This question has been around since the 1930s.

11. Ants learned how to cultivate mushrooms to provide themselves with food long ago; ants "developed agriculture" millions of years earlier than humans.

12. In some regions, not giving money to one's wife is also considered a form of domestic violence, because some regulations stipulate that economic blockade falls under the category of domestic violence.

Butterfly

Thirteen. Everywhere butterflies pass by, and every object they come into contact with, they want to taste it.

Fourteen. A survey on "whether you prefer a pretty face or a hot body" showed that 84% of people chose the former.

15. Red tides occur in the ocean because plankton in the ocean multiply explosively in a short period of time, causing the water to turn reddish-brown or green.

16. If you compare the average number of friends a person has with the average number of friends of that person's friends, the second person will always have more friends than the first person. In other words, your friends always have more friends than you. This is the friendship paradox proposed by Scott Field in 1991.

Amphioxus

17. Amphioxus is an animal without a heart, relying on the pulsation of the abdominal aorta to transport blood. Moreover, amphioxus is not a member of the large fish family, but belongs to the branchiostomidae family of the subphylum Cephalochordate.