01. If you have long hair, don't sleep with it pressed down on your head today. Let your hair spread out to reduce frizz and make it smoother.

02. The essence of "ma" in "mala" is a vibration of about 50 Hz, while "la" is caused by capsaicin, which produces a pain sensation in the body. They have nothing to do with taste or human taste.

03. There is a strange condition called feather itch phobia, the main symptom of which is the fear of being tickled by feathers.

04. If all the iron in his body were extracted, it could make a nail about 4 centimeters long. If all the carbon in his body were extracted, it could make 9,000 pencils.

05. Not all birds have only two wings. There is a bird called the "four-winged bird" that has four wings, making it the bird with the most wings in the world. However, apart from having more wings, the four-winged bird has the same characteristics as other birds.

06. When a forest is attacked by insects, the trees can warn neighboring trees.

07. By recycling just one glass bottle, the energy saved is enough to power a 100-watt light bulb for four hours.

08. The bumps that appear after being bitten by mosquitoes are mainly due to an allergic reaction to mosquito saliva.

09. When a person scratches a scab, the brain releases endorphins, which make people feel happy and addicted.

10. The driest place in the world is not the Sahara Desert, but the icy Antarctic, where it has not rained for 2 million years.

11. Nematodes are the deepest known inhabitants of Earth, living at a depth of 3.6 kilometers.

12. Mango peel contains a certain amount of urushiol, a common toxin found in plants, which is why some people are allergic to mango peel.

13. The world’s most famous starry sky is located in the town of Tekapo, New Zealand.

14. Bananas bend during growth mainly because of their phototropism.

15. Once mushrooms mature, they produce hundreds of millions of seeds, which will then drift across the mountains and fields when the wind blows.

16. In common crushed ice popsicles, the round end is slightly longer than the sealed end, so you'll know how to divide them next time you're making popsicles.

17. Mosquitoes are more easily attracted to blue, and are twice as likely to be attracted to blue as to other colors.

18. The behavior of two fish moistening each other's bodies with their saliva when there is no water is called mutual support in times of distress.

19. The opening of a koala's pouch faces downwards.

20. Of all known animals, humans are the only ones who can blush.

21. Survey data shows that an average person uses the restroom 6 times a day. Do you wash your hands more often than that?