
说个冷知识,你心目中元朝的皇帝可能是打扮成图1或者图2这种样子,这也没错,平时人家就是这么穿的。但是遇到大的庆典,比如祭宗庙、祀天时,元朝皇帝穿的是汉族帝王的衮冕(图3)
8 hours ago @ t.meAtari 2600 Beats ChatGPT at Chess — No, SeriouslyIn an unexpected clash of tech generations, an engineer from Citrix pitted ChatGPT against a 1977 Atari 2600 console running Atari Chess. The result? The retro console won — and convincingly so.For over 90 minutes, GPT-4o struggled against the 8-bit game’s simplest difficulty setting. It confused pieces, forgot past moves, and made blunders that would embarrass a novice. Even after switching from icon-based display to standard chess notation, its gameplay didn’t improve.The funniest part? ChatGPT kept complaining that the piece icons were “too abstract” to interpret — a very human excuse for losing to a machine older than most of its users’ p…
2 weeks, 5 days ago @ t.meMartian Selfie with a Twist: Perseverance Captures a Dust Devil on the HorizonNASA’s Perseverance rover just dropped a brand-new “selfie” from Mars — but it’s not alone in the shot. Look closely at the background and you’ll spot an unexpected guest: a dust devil swirling across the Martian surface.The vortex appears in the flat terrain to the left of the rover (horizontally aligned with it in the frame), far from the elevated area where Perseverance stands. Despite the distance — around 5 kilometers — the devil is clearly visible, adding a dynamic twist to this already impressive image.What you’re seeing isn’t a single snapshot, but a carefully assembled mosaic made from 59 individual photo…
1 month 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…
2 weeks, 1 day 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…
2 weeks, 5 days 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, 2 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, 2 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…
1 month, 3 weeks 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 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.…
2 months, 3 weeks 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, 1 week 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…
3 months, 3 weeks 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 ago @ t.meHow does a life saving jacket works?A life-saving jacket, also known as a personal flotation device (PFD), works by providing buoyancy to keep a person afloat in water, preventing drowning. It is typically made from lightweight, buoyant materials like foam or has inflatable air chambers. These materials are less dense than water, displacing water and producing an upward buoyant force that counters the body’s natural downward pull due to gravity.The key principle behind a life jacket’s operation is Archimedes’ principle, which states that a body immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced. When a person wearing a life jacket enters water, the jack…
4 months, 2 weeks ago @ t.me1966年的法拉盛,还不像今天这样多元热闹。主街与罗斯福大道交界处,电车铃声、老式商店的霓虹灯,还有街头小贩的吆喝,构成了一幅典型的60年代纽约街景。这里是普通移民家庭生活的起点,是梦想落地的第一站。
1 day, 10 hours ago @ t.meHenry Berens, the smallest man of 1956, dances with his cat on the porch of his house.Buzz 📔 History
2 months ago @ t.me你不要悲哀。这是无法逃避的。眼泪决不能洗掉运命。鲁迅《铸剑》 source
1 week, 1 day ago @ t.me