
什么意思?成都为什么有彩虹?
6 hours ago @ t.me广告_刚准备好装 X,你却给我吃肯德基来自 KFC 的广告「Sorry, Manners」,来到一座古堡,穿着华丽的礼服坐在长桌前等待上菜,没想到,等到的居然是香气扑鼻的 KFC 全家桶!via 开眼
16 hours ago @ t.meChinese scientists find genetic switch for organ regeneration in mammalsBreakthrough in regenerative medicine from Chinese researchers at NIBS and BGI Research. Publication in Science showed how to restore healing ability in mammals.The key is the Aldh1a2 gene, responsible for vitamin A metabolism. In fish and salamanders, it is active, but in mammals, it is blocked by evolution.Scientists "switched on" this gene in mice and rats, leading to complete regeneration of soft and joint tissues. The mechanism works through the production of retinoic acid.This discovery could simplify the treatment of bone, limb, skin, nerve, and lung injuries in humans.#regeneration #Aldh1a2 #biotechnology #China…
1 week, 4 days ago @ t.meThe world’s largest telescope has captured its first images of the night skyAfter more than a decade of construction, the observatory atop El Peñón has finally begun operations this spring. In just ten hours of observation, the telescope recorded millions of galaxies and dozens of asteroids — marking the beginning of a new era in our exploration of the universe.The first released image features the Trifid Nebula and the Lagoon Nebula, both located within the Milky Way.
2 weeks, 4 days ago @ t.meWhat 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 …
3 days ago @ t.meWhat 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…
3 weeks, 6 days ago @ t.meWhat 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…
1 month ago @ t.meWhy 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…
1 month, 3 weeks ago @ t.meWhat is Captcha [ C.A.P.T.C.H.A ] in computer?CAPTCHA, which stands for Completely Automated Public Turing test to tell Computers and Humans Apart, is a security mechanism used on websites to verify that a user is not a bot. It presents challenges that are easy for humans but difficult for automated systems to solve, protecting online services from spam, fraud, and abuse.CAPTCHAs typically involve tasks like identifying distorted text, selecting images (e.g., “click all pictures with traffic lights”), or solving simple puzzles. These exploit human cognitive abilities, such as pattern recognition or contextual understanding, which bots struggle to replicate accurately. For example, early C…
1 month, 3 weeks ago @ t.meWhy Earth is called blue planet?Earth, often called the Blue Planet, earns this nickname due to its stunning appearance from space, where about 71% of its surface is covered by water, mainly oceans. This water reflects blue light because water molecules absorb longer red wavelengths and scatter shorter blue ones, giving Earth its vibrant hue. The presence of liquid water is unique in our solar system, making Earth a haven for life. Oceans play a critical role in regulating the planet’s climate, absorbing heat, and driving weather patterns. Additionally, Earth’s atmosphere, rich in nitrogen and oxygen, scatters blue light, enhancing the planet’s azure glow. Satellite images, like those fro…
2 months ago @ t.meHow is communication established between space stations and Earth?Communication from space stations like the International Space Station (ISS) relies on radio signals transmitted through a network of satellites and ground stations. The ISS communicates with Earth using NASA’s Tracking and Data Relay Satellite System (TDRSS). Signals from the ISS are first sent to a TDRS satellite positioned in geostationary orbit. These satellites then relay the information to ground stations located on Earth, such as those in New Mexico (USA). From there, the data is sent to mission control centers like NASA’s Johnson Space Center or ESA’s Mission Control in Europe.The types of communication include voic…
2 months, 2 weeks ago @ t.meWhat is Google Street View and How does it Work?Google Street View is a technology featured in Google Maps that provides the panoramic views from various streets of the world. It was launched on May 25, 2007 by Google in several cities in the United States, since then it has expanded to many cities and areas of the world. Till today, Google Street View is launched in about 80 countries of the world.Google Street View displays panoramas of the images. For this, Google uses the cars on which high resolution 360 degree cameras are mounted and these cars travels in whole cities and take up photographs of the streets and monuments.Then, these photographs are uploaded by Google for Street View.…
3 months ago @ t.meWhat is Chemotherapy and How does it work?Chemotherapy is a drug treatment that uses powerful chemicals to kill fast-growing cells in your body. Chemotherapy is most often used to treat cancer, since cancer cells grow and multiply much more quickly than most cells in the body.Chemotherapy circulates throughout your body in the bloodstream. So it can treat cancer cells almost anywhere in the body. This is known as systemic treatment. Chemotherapy kills cells that are in the process of splitting into 2 new cells. Body tissues are made of billions of individual cells. Once we are fully grown, most of the body's cells don't divide and multiply much. They only divide if they need to repair d…
3 months, 3 weeks ago @ t.meWhy are medicines available in different forms such as capsules, tablets, and liquids?Medicines come in various forms—capsules, tablets, and liquids—based on the drug’s properties, the method of delivery, and patient requirements. Capsules are used when the medicine needs protection from stomach acid or for controlled release over time. They are also preferred for masking the taste of unpleasant drugs or for drugs sensitive to moisture. Tablets are popular because of their stability, precise dosing, and cost-effectiveness. They have a longer shelf life and are easy to mass-produce. In contrast, liquid forms are useful for patients who have difficulty swallowing or when rapid absorption is…
4 months ago @ t.meWhat is Jet lag?Jet lag is a temporary sleep disorder that occurs when a person rapidly travels across several time zones, causing a disruption in the body’s internal clock, also known as the circadian rhythm. The circadian rhythm controls essential bodily functions such as sleep, digestion, and hormone release based on a 24-hour cycle. When this internal clock is misaligned with the local time at the destination, it leads to jet lag.The most common symptoms of jet lag include fatigue, daytime sleepiness, and insomnia. Individuals may struggle to fall asleep at the appropriate time, often waking up too early or feeling excessively tired even after sleeping. Other symptoms include difficul…
4 months, 2 weeks ago @ t.meHenry Berens, the smallest man of 1956, dances with his cat on the porch of his house.Buzz 📔 History
2 months, 1 week ago @ t.me