你不知道的生活经验@knowledge1024
你不知道的生活经验@knowledge1024
5 hours ago @ t.meLast night’s strong geomagnetic storm painted the sky with an unusually rare red aurora — and from the International Space Station it looked like the crew was literally flying through the glowing curtain, Russian cosmonaut Sergey Kud-Sverchkov said. Why the red? Green auroras typically glow around ~100 km altitude, but red emissions come much higher (~300–400 km), where the atmosphere is thinner and it takes more energy to light it up — which is why this color is far less common. #SpaceWeather #Aurora #ISS #SolarStorm
6 days, 6 hours ago @ t.me
GPT-5.2 Pro has solved its fourth Erdős problem.Mathematician Terence Tao described the result [...]
GPT-5.2 Pro has solved its fourth Erdős problem.Mathematician Terence Tao described the result as “perhaps the most unambiguous so far” in terms of the uniqueness of the approach.The author of the solution (if we can even call a human that — given the problem was simply fed into ChatGPT 🤔) claims that no prior solutions existed at all.That’s not entirely true: forum users point out draft proofs in the literature from 1936 and 1966. However, Tao emphasizes that GPT-5.2’s method is fundamentally different from those earlier attempts.Now the obvious question remains:how will GPT-5.2 surprise us once the Erdős problems finally run out? 😏Forum discussion:www.erdosproblems.com/forum/thread/281?or…
1 week ago @ t.me
In short, here’s where things stand today:On a distant planet, there is a massive superpower c [...]
In short, here’s where things stand today:On a distant planet, there is a massive superpower comfortably settled on one half of a continental landmass. It keeps glancing at the other half — a patchwork of semi-vassal micro-states, always rushing around, arguing about whom to serve, yet sitting atop sacred deposits of vibrium, the fuel that powers the entire cosmic economy.Naturally, such chaos simply must be “put in order,” right? Preferably — in its own kind of order.On the other side of the world lives another great power, and beside it — the fractured shard of a once-mighty empire. A strange shard: wounded, supposedly humbled, expected to quietly repent and be grateful for whatever scrap…
2 weeks, 5 days ago @ t.me
Scientists Discover a New Way to Slow Cellular AgingBiologists at Cornell University have unco [...]
Scientists Discover a New Way to Slow Cellular AgingBiologists at Cornell University have uncovered a surprising mechanism that may help cells resist aging.The key players are extracellular vesicles — tiny membrane bubbles released by embryonic stem cells. When these vesicles interact with aging cells, they significantly slow down cellular senescence, a process triggered by oxidative stress that halts cell division and degrades tissue function.In experiments with mouse embryonic stem cells, researchers found that these vesicles helped skin, muscle, and nerve cells stay active and functional for much longer than usual.🔬 Why does it work?The vesicles carry fibronectin, a protein on their surf…
2 weeks, 5 days ago @ t.meThis is Guizhou Province, China — mountains completely covered with solar panels.The scale is so massive that drones don’t have enough battery to capture the entire mountain range in a single flight. Just endless ridges of photovoltaics stretching to the horizon.By turning rugged, hard-to-use terrain into energy infrastructure, China is effectively farming millions of kilowatt-hours every month.Guizhou has become a symbol of China’s renewable strategy: • use land with low alternative economic value • build at industrial scale, not pilot projects • integrate renewables directly into national energy planningWhile others debate whether such transitions are realistic, China simply builds them.T…
1 month, 1 week ago @ t.me
[Media] What is the purpose of keeping water in the oxygen cylinder setup in hospitals?In ho [...]
What is the purpose of keeping water in the oxygen cylinder setup in hospitals?In hospitals, water is kept in a bottle attached to the oxygen cylinder to humidify the oxygen before it is delivered to the patient. Medical oxygen supplied from cylinders or central pipelines is dry and moisture-free. If this dry oxygen is given directly for long periods, it can dry out the nasal passages, throat, and airways, leading to irritation, burning sensation, nosebleeds, sore throat, and thickened mucus. The humidifier bottle partially fills with sterile or distilled water, and as oxygen bubbles through this water, it picks up moisture, making the inhaled oxygen comfortable and safe for the patient.H…
1 week, 2 days ago @ t.me
[Media] What do we mean when we call people Millennials, Gen Z, or Gen Alpha, and why are th [...]
What do we mean when we call people Millennials, Gen Z, or Gen Alpha, and why are these terms used?Terms such as Baby Boomers, Generation X, Millennials, Generation Z, and Generation Alpha are used to group people based on when they were born and the kind of world they grew up in. People from the same generation often share similar experiences—such as exposure to technology, education systems, economic conditions, and major global events—which shape their thinking, habits, and lifestyle. These labels help us understand how different age groups relate to society and change over time.In chronological order, the sequence begins with Baby Boomers (1946–1964), born after World War II during a …
1 week, 5 days ago @ t.me
[Media] Why do some people temporarily lose memory after cold shower, pain, or fear?Sudden s [...]
Why do some people temporarily lose memory after cold shower, pain, or fear?Sudden stimuli such as a cold shower, intense pain, fear, or emotional shock activate the body’s fight-or-flight response. Stress hormones like adrenaline and cortisol are released rapidly, breathing may become irregular, and blood is preferentially redirected toward the heart and muscles. During this phase, the brain temporarily deprioritizes higher functions such as thinking and memory, which can cause mental blankness or confusion.The hippocampus, responsible for short-term memory formation and recall, is extremely sensitive to stress hormones and brief changes in blood flow and oxygen. Acute stress transiently…
1 week, 6 days ago @ t.me
[Media] What are security tags on clothes?A security tag in clothes is a device used by shop [...]
What are security tags on clothes?A security tag in clothes is a device used by shops to prevent theft. It is usually made of hard plastic and attached firmly to the garment so that it cannot be removed without special tools. These tags mainly work in two ways. Some are electronic article surveillance (EAS) tags, which contain a small strip or coil that communicates with sensors at the store’s exit. If the tag is not deactivated or removed by the cashier, it sets off an alarm when the person tries to leave. Others are ink tags, which contain small tubes filled with permanent ink. If someone tries to force the tag open, the tubes burst and spoil the fabric, making the stolen item useless.M…
4 months, 3 weeks ago @ t.me
[Media] What is APGAR Test?The APGAR test is a quick assessment performed on newborns shortl [...]
What is APGAR Test?The APGAR test is a quick assessment performed on newborns shortly after birth to evaluate their physical condition and determine if immediate medical care is needed. Developed by Dr. Virginia Apgar in 1952, the test measures five criteria: Appearance, Pulse, Grimace response, Activity, and Respiration.Each criterion is scored from 0 to 2, with a maximum total score of 10.APGAR Criteria BreakdownAppearance (Skin Color): A score of 0 indicates pale or blue skin, 1 for pink body with blue extremities, and 2 for a completely pink body.Pulse (Heart Rate): 0 for no heartbeat, 1 for a heart rate below 100 beats per minute, and 2 for a heart rate above 100.Grimace Response (Re…
5 months, 3 weeks ago @ t.me
[Media] What is Motion Sickness?Motion sickness, also known as travel sickness or kinetosis, [...]
What is Motion Sickness?Motion sickness, also known as travel sickness or kinetosis, is a condition characterized by a combination of symptoms that occur when there is a discrepancy between the motion sensed by the inner ear and the visual perception of motion. It typically occurs during travel or when exposed to certain types of motion, such as in a moving vehicle, boat, airplane, or amusement park ride.When we are in motion, our body receives sensory input from various sources, including the inner ear (vestibular system), eyes, and muscles. These sensory inputs are normally synchronized, providing a consistent perception of movement. However, in certain situations, such as when reading …
6 months, 3 weeks ago @ t.me
[Media] What is Fish rain?Fish rain is a rare natural phenomenon where fish fall from the sk [...]
What is Fish rain?Fish rain is a rare natural phenomenon where fish fall from the sky during or after rainfall. This unusual event, also known as animal rain, has been reported in various parts of the world such as Yoro (Honduras), Kerala (India), and Lajamanu (Australia). The most accepted scientific explanation involves waterspouts — tornado-like rotating columns of air over water. These waterspouts can suck up small aquatic animals like fish or frogs from lakes or oceans and carry them into the atmosphere. When the storm moves inland and loses strength, the animals fall to the ground, often with rain.There are also non-tornado causes. Strong updrafts in thunderstorms or microbursts can…
7 months, 2 weeks ago @ t.me
[Media] What is a three parents baby?A three-parent baby is a human offspring produced thr [...]
What is a three parents baby?A three-parent baby is a human offspring produced through assisted reproductive technologies involving genetic material from three individuals: one man and two women. This technique, known as mitochondrial replacement therapy (MRT), is designed to prevent the transmission of mitochondrial diseases, which are severe genetic disorders caused by faulty mitochondrial DNA (mtDNA) passed from mother to child. Mitochondria, the cell’s energy producers, have their own DNA, and mutations can lead to conditions like organ failure or neurological disorders.The process involves transferring the nuclear DNA (containing most genetic traits) from the mother’s egg, which ha…
7 months, 2 weeks ago @ t.me
[Media] Why are encircling Pacific ocean called Ring of Fire?The Ring of Fire is a major are [...]
Why are encircling Pacific ocean called Ring of Fire?The Ring of Fire is a major area in the Pacific Ocean basin known for its intense seismic and volcanic activity, named for its horseshoe-shaped zone of frequent earthquakes and volcanic eruptions that resemble a fiery ring when mapped. It stretches about 40,000 kilometers, encircling the Pacific, touching continents like North and South America, Asia, and Australia, and including islands like Japan, Indonesia, and New Zealand.This region is geologically active due to tectonic plate boundaries, where plates converge, diverge, or slide past each other. Most of the Ring of Fire lies along subduction zones, where oceanic plates slide beneat…
8 months, 2 weeks ago @ t.me
#名人 丽塔·海华斯,1940年代Rita Hayworth 1940's.丽塔·海华斯(Rita Hayworth,1918-1987)是1940年代最具代表性的好莱坞女星之一,被誉为"爱之女神"。
#名人 丽塔·海华斯,1940年代Rita Hayworth 1940's.丽塔·海华斯(Rita Hayworth,1918-1987)是1940年代最具代表性的好莱坞女星之一,被誉为"爱之女神"。
6 days, 12 hours ago @ t.me
“没事的,”他说,“我真希望能死在一片麦田或者玉米地中。”“你说什么?”“让麦秆在我的头顶随风舞动。你知道,有句话这么说:‘起风了,好好活着。’”《孤独的池塘》弗朗索瓦丝·萨冈陈剑(译) source
“没事的,”他说,“我真希望能死在一片麦田或者玉米地中。”“你说什么?”“让麦秆在我的头顶随风舞动。你知道,有句话这么说:‘起风了,好好活着。’”《孤独的池塘》弗朗索瓦丝·萨冈陈剑(译) source
2 months, 2 weeks ago @ t.me