There are many little-known facts in our lives, but many people may not know them. Today, let's look at 20 little-known facts you might not know: some may seem illogical, but they are all true!

　　1. When your throat is itchy, try scratching your ear; it will feel much better after a while.

　　2. The higher your IQ, the greater your chances of being single. To answer that saying, heroes are always lonely, and the strong are always the loneliest.

　　3. Expired mosquito coils not only breed a large number of bacteria and microorganisms, but also reduce their mosquito-repelling effect.

　　4. Heating a magnet will cause it to lose its magnetism and turn it into scrap iron.

　　5. If you have kidney stones, you can try riding a roller coaster. I've heard it can help pass the stones.

　　6. Ants do not have skeletons, but do not overlook their exoskeleton, as it effectively protects their vital organs.

　　7. Each eye has a blind spot, which the other eye just fills.

　　8. Microplastics are found in the highest concentrations in children's feces.

　　9. Experts say that people who like to bite their nails have fingernails that grow 20% faster than others.

　　10. There is only one part of the body that is connected to a muscle at only one end: the tongue.

　　11. When couples kiss, 70% of them will turn their heads to the right.

　　12. The Mona Lisa once hung in a place you would never imagine: the bathroom of King Francis I of France.

　　13. A dog sneezing is often a cues, indicating that it is playing with people or other dogs.

　　14. Aphids are ants' favorite insects because they can excrete high levels of sugar, and ants are not overly protective of aphids.

　　15. People who sing off-key are not "beyond saving." They just need to find a professional music teacher and practice more to find the right pitch.

　　16. Before 1830, tomato sauce was a medicine and was only sold to the public.

　　17. On summer mornings, we can see that plants are wet, which may be due to dew or plant excrement.

　　18. Male giraffes will nudge the female giraffe's bladder with their heads to help with excretion. Male giraffes can also tell if a giraffe is ovulating.

　　19. We often see people blocking car tires with wooden boards because dog urine can damage tires and is corrosive.

　　20. Why do we often say that mice are experimental subjects? Because their chromosomes are similar to those of humans, they reproduce quickly, and they are small in size.