[1] Clicking the mouse consumes 1.42 calories, and replying to a post earns 1 experience point!





[2] A regular pencil can draw a line over 60 kilometers long.





[3] The DNA of each cell in the human body is about 1 meter long, and there are about 10 trillion cells in the human body. If the DNA of all the cells in a human body were connected, a "cell chain" 10 trillion meters long would be obtained. This is equivalent to traveling at the speed of light for 9 hours, or 1.5 times the distance from the sun to Pluto.





[4] Now, if you look at any star in the sky, what you see as "that scene of the starry sky" is actually the stars from thousands or tens of thousands of years ago.





[5] It is known that insects do not fly towards light and fire as depicted in literary works, but rather use their phototaxis to navigate.





[6] The Turritopsis nutricula is immortal and does not die.





[7] As of 2013, "Sherlock Holmes" was the most frequently appearing "human character" in film and television works (254 times). The character that appears most often among all characters is "Dracula the vampire" (272 times). (The Japanese devils just laugh)





[8] According to the history of human space exploration, the "Olympus Mons" on Mars is the highest mountain in the solar system, with an altitude of about 21,000 meters, while the highest peak on Earth, Mount Everest, has an altitude of about 8,844 meters.





[9] Since its discovery in 1930, Pluto will complete its first revolution since its discovery on March 23, 2178.





[10] According to current archaeological findings (2014), the time when "Stegosaurus" and "Tyrannosaurus" lived was much farther than the time when "Tyrannosaurus" lived with us (2014), and the time difference between our existence and that of Tyrannosaurus is about 65 million years.





[11] There is no oxygen in the universe, so why does the sun burn? Because the sun is a plasma flame, and combustion is defined as the rapid oxidation of an object, producing light and heat.





[12] Humans cannot normally tolerate the same environmental temperature as their normal physiological body temperature





. [13] If a city uses a single water supply system, then if a high-voltage power line falls into the water, the city will be safe! This is due to "equipotential bonding," where each building is like a "Faraday cage."





[14] In an environment of continuous and strong radiation, you may die, but your nervous system will remain intact. This is because the sensitivity of cells in different organs of the human body to radiation is different. Often, the cells with a higher degree of differentiation are less affected by radiation.





[15] During thunderstorms, stay away from these "lightning rods that protect your safety", the farther the better! Because when the lightning cloud discharges close to the ground, the tip of the lightning rod will first sense the charge, which will cause a distortion of the spatial electric field, affecting the direction of the lightning leader development, causing it to strike the lightning rod, thereby protecting other equipment...





[16] The feeling of "stepping into the air" is due to the cerebellum's misjudgment.





[17] If you put soybeans, melon seeds, or similar things in any dish and "shake" them, the "big ones" will be on top... This is an example of the Brazil pea effect.





[18] Memories before the age of three or four "do not exist" because your brain's function of organizing and managing memories at that time is not yet perfect.





[19] Giraffes will die of heart failure if they slip and fall. Giraffes have twice the blood pressure of humans and a heart rate as high as 150 beats per minute. When a giraffe falls, the difference in level between its head and heart decreases sharply, causing cerebral congestion.





[20] Why do fans generally have at least 3 blades? This is because a fan with one blade is subjected to a great centrifugal force. When rotating at high speed, it will cause extreme instability and a great risk of "flying out". Two blades are used to allow the two blades to counteract the centrifugal force while rotating at a certain angle at high speed. Therefore, the existence of two blades ensures that the fan blades "will not fly out"! However, the efficiency of two blades is not only extremely low, but also places great demands on the motor and bearings. A fan with "three blades" just meets all these requirements! 4, 5, 6, 7... are all acceptable, but 3 blades are the minimum standard specification.





[21] Why do bullets fired from the muzzle also glow? Because that is the light emitted by tracer bullets used to correct the trajectory. Tracer bullets have a wide range of uses and must be equipped in every soldier's bullets. It is also a tactical requirement. There may be one every five or ten bullets, or it may be the last one to remind you that you have run out of bullets.





[22] Deaf-mute people (congenital) can speak, but they do not know how to pronounce words.





[23] In addition to helping you hear, ears can also help you keep your head balanced.





[24] Around 2030, China's population will begin to decline.





[25] You think you look better in the mirror, but sometimes you think you look ugly in photos. Your family and friends think you look normal. This is because you often look in the mirror and are used to seeing yourself in the mirror. Others see you as the opposite of the mirror, so they tend to like you more in photos. This is one of the four factors of attraction to others: proximity, familiarity, physical attraction and others' opinions.





[26] A person's IQ drops to 0 in the moment of anger and returns to normal after one minute





. [27] The moon is moving away from the earth at a speed of 3.8 centimeters per year.





[28] Each suit of the King in a deck of cards represents a great monarch in history: spades is King David, clubs is Alexander the Great, hearts is Charlemagne, and diamonds is Julius Caesar. [29]





Bruce Lee's movements are so fast that they are not visible, so the film speed has to be slowed down when shooting movies.





[30] Leonardo da Vinci could write with one hand and paint with the other.





[31] A person will die after about ten days without sleep. If a person gets enough sleep, 100,000 brain cells die every day. If a person lives to be 100 years old, only one-third of the brain cells will die. The person will still be healthy, have a good memory, and will not get Alzheimer's disease. However, if a person does not get enough sleep, 300,000 to 400,000 brain cells will die every day. This will lead to cardiovascular insufficiency, heart disease, high blood pressure, constipation, memory loss, and lethargy. If a person suffers from insomnia or sleeps for less than three hours, they are likely to get Alzheimer's disease in the long run. In severe cases, they may suffer from mental breakdown.





[32] Of all liquids, the cheapest is tap water and the most expensive is Chanel perfume.





[33] Testicular pain in men can cause pain throughout the body. One testicular pain in a man is equivalent to 300 consecutive childbirths in a woman.





[34] Edison's famous quote: Success is 99% perspiration and 1% inspiration. I always heard inspirational quotes when I was a child, but the original quote also had a line: "But sometimes the 1% inspiration is more important than the 99% perspiration."





[35] Apples are currently considered junk fruit with low nutritional content! Their main function is to promote the peristalsis of the stomach and intestines and speed up digestion! So when you are hungry, eating apples will make you hungrier.





[36] There is a gas called laughing gas, chemical formula N2O. It will make you laugh after smelling it. The century-old mystery that has troubled mankind, "Which came first, the chicken or the egg?" has finally been answered. The answer is: the chicken came first and then the egg. British scientists explained that eggs can only be formed under the catalysis of a chemical substance, and this substance only exists in the ovary of chickens.





[37] The century-old mystery that has troubled mankind, "Which came first, the chicken or the egg?" has finally been answered. The answer is: the chicken came first and then the egg. British scientists explained that eggs can only be formed under the catalysis of a chemical substance, and
this substance only exists in the ovary of chickens.





[38] Besides being a well-known scientific giant, Einstein was also a man who was quite popular with women. In his youth, Einstein not only had a child out of wedlock in a class with only one female classmate, but he also had numerous affairs, ranging from female spies, shopkeepers, socialites, and village widows to even a mother and daughter with unclear entanglements.





[39] E=mc²
is undoubtedly one of the most brilliant scientific discoveries, but also one of the most unsettling. The power expressed in the formula lies mainly in c², the square of the speed of light (299,792 km/s), which is 89,875,243,264. With this as a multiplier, you don't need much matter (a tiny amount of plutonium is enough) to generate enough energy to destroy a city.





[40] The United States built the F-22 in order to counter China in the future. However, after so many years, the F-22 has no use and can only fight with Transformers in movies. Finally, the United States could no longer tolerate it and stopped the production of the F-22.





[41] More than 90% of the ocean is still undeveloped. In fact, we have developed less than 10% of the ocean. Although we have identified 212,906 marine species, there may be more than 25 million species that we do not know.





[42] After soaking an egg in vinegar for 5 hours, you will get a transparent egg. Einstein actually had excellent grades in elementary school. Saying that he had poor grades is just to illustrate that you can still achieve great things if you do not study well when you are young.





[43] Einstein actually had excellent grades in elementary school. Saying that he had poor grades is just to illustrate that you can still achieve great things if you do not study well when you are young.





[44] If the moon is directly overhead, your weight will decrease slightly.






[45] Every year, nine people around the world are hit by meteorites.





[46] It takes an average of 200,000 years for each photon to travel from the core of the sun to its surface, and then it takes you 8 minutes to see it.




[47] If you're afraid of getting cold while sleeping, just sleep naked. The principle is: body temperature remains the same when you're dressed, but it will rise when you're naked.





[48] If your car could defy the laws of physics and drive vertically upwards at maximum horsepower, you could probably drive off the Earth in about an hour.





[49] Spiciness is not a taste but a tactile sensation.





[50] The first person to successfully cross Niagara Falls later slipped on an orange peel and died.