1. The sun's diameter is 400 times larger than the moon's, and it is also about 400 times farther from Earth than the moon.

2. Most fish, in order to remain highly alert, often sleep for only a few minutes, sometimes even just a few seconds, as short as a human taking a nap.

3. Picasso's full name is: Pablo Diego José Santiago Francisco de Paula Juan Nepomuceno Crispiniano de Ross Remedios Cipriano de la Santiago Trinidad Maria Palicio Critto Ritz Blasco Picasso

4. Tetris is a casual game invented by Russian Alexei Pajitnov in June 1984.

5. In wild chimpanzee groups, to avoid inbreeding, pregnant female chimpanzees usually leave their current group and join a new one.

6. The sex of baby sea turtles is determined by the incubation temperature. Incubation below 27.7 degrees Celsius results in a male, while incubation above 31 degrees Celsius results in a female. Baby turtles hatching between these temperatures can be either male or female.

7. The word "mud" in "utterly drunk" actually refers to a type of insect, not rotten mud.

8. The English name for Chinese Baijiu is "Chinese Baijiu".

9. The original name of cucumber was Hu Gua, which was brought back by Zhang Qian during his mission to the Western Regions in the Han Dynasty.

10. There is almost no air convection on the lunar surface, and no wind erosion, so footprints left on it may not change for hundreds of years.

11. The twelve constellations we are familiar with refer to the zodiac constellations, in addition to the northern constellations and the southern constellations.

12. Newborn ducklings will mistake the first animal they see for their mother and waddle after it.

13. The sentence “The quick brown fox jumps over the lazy dog” uses all 26 letters of the English alphabet.

14. The character 荤 (hūn) originally referred to pungent vegetables such as scallions and garlic, but later came to refer to certain types of meat, such as chicken, duck, and fish.

15. The polar bear's "white fur" is hollow and transparent; it appears white only because of the refraction of sunlight.

16. Qin Hui was Li Qingzhao's cousin-in-law.

17. In modern astronomy, there are a total of 88 constellations.

18. Gas masks were designed based on the face of a pig.

19. Due to a genetic defect, the cat in the house cannot taste sweetness.

20. When two sea otters float on the water to sleep, they usually hold hands to prevent their best buddy from drifting away when they wake up.

21. Beavers have orange incisors that are rich in iron, making them strong, durable, and resistant to chewing.

22. When African ostriches are incubating their eggs, the male and female ostriches take turns incubating them.

23. The "seven inches" in the saying "strike the snake at its seven-inch spot" refers to the snake's heart.

24. The largest organ in the human body is our skin.

25. In volleyball, players may also kick the volleyball with their feet.

26. Cows do not have upper teeth; they chew and grind their food by rubbing their upper keratin layer against their lower teeth.

27. Venus rotates in the opposite direction to the other planets in the solar system.

28. The first half of the life of a swamp eel is female, and the second half is male. The intermediate transition stage is called the intersex stage, and this transformation from female to male is called the "sex reversal phenomenon".

29. Some aquatic mammals, such as dolphins, can sleep with one half of their brain while the other half remains awake. This phenomenon is known as "hemispheric sleep."