1. Disneyland used to prohibit men with long hair from entering, a rule that was not changed until 1960.

1. If all the iron in the body were extracted, a nail about 4 centimeters long could be made.

2. Under ideal conditions, two flies can produce nearly 5.6 billion offspring in four months.

3. Every 100 grams of chili peppers contains 198 milligrams of vitamin C, making chili peppers the vegetable with the highest vitamin content.

4. How is the sense of smell generated? The nasal mucosa contains tens of millions of olfactory cells. When odor molecules in the air enter the nasal cavity, these olfactory cells become active, converting the perceived stimuli into information, which is then transmitted to the brain via the olfactory nerve.

5. The phrase "小鸟依人" (xiǎo niǎo yī rén) was originally used to describe a man.

6. When cameras first appeared, it took eight hours of exposure time to take a single photograph.

7. Snow leopards can hunt prey up to three times their own weight.

8. Coca-Cola once produced a "Marshal Edition" of Coca-Cola.

9. The upper surface of a leaf contains more chloroplasts and is heavier, so it will fall to the ground face down unless disturbed by external forces.

10. A diamond can be formed in another diamond.

11. The tyrosine in eggs can enhance a person's reaction ability.

12. The natural melanin in food is completely different from the melanin in hair, so it is impossible to make your hair black by eating black foods.

13. The inability to accept ridicule from others, whether it is genuine mockery or unintentional humor, and the feeling of being tormented by being laughed at, is a symptom known as aphrodisiac.

14. Crocodiles actually "stand" in the water.

15. Horses have the largest eyes of all land mammals, and their eyes even have the effect of colored contact lenses and sunglasses.

16. People are more likely to have lucid dreams when they are in a semi-asleep state.

17. In order to become an "only child," fire salamanders will eat their other brothers and sisters after birth.

18. Cats are the only domesticated animals not mentioned in the Bible.

19. When cameras first appeared, it took eight hours of exposure time to take a picture.

20. Mosquitoes can bite drunk people without making them drunk. Although animals can also get drunk, mosquitoes have a high alcohol tolerance.

21. Why are chili peppers spicier the more wrinkled their skin? Fresh chili peppers are spicier the more wrinkled their skin is. This is because the reduction of lignin in chili peppers causes wrinkles on the skin, and the reduction of lignin increases the amount of capsaicin.