
Sam Altman:用户对ChatGPT使用礼貌用语让OpenAI增加数百万美元能耗😂😂有效利他主义✅传统道德规范❌
an hour ago @ t.me🎙 NEW PODCAST | This Week in Science Highlights:🕳 Lone Black Hole ConfirmedAstronomers have confirmed the first-ever black hole without a companion star — discovered only because it passed in front of a distant star, briefly magnifying its light .🌌 Ultralight Dark Matter: A New Way to Detect ItAstrophysicists have proposed a bold new method to detect ultralight dark matter — by tracking subtle shifts in star positions using precision astrometry .🌍 17% of Global Farmland ContaminatedA massive new study reveals that up to 17% of the world’s cropland is polluted with toxic heavy metals, threatening food safety for over 1.4 billion people .💡 Focusing Light at the NanoscaleResearchers have demon…
2 days, 7 hours ago @ t.mePlants Absorb Microplastics Directly from Air, Raising Concerns Over Food SafetyRecent research has revealed a troubling environmental threat: plants can directly absorb microplastics from the atmosphere, causing plastic particles to accumulate extensively within vegetation. Scientists warn that this phenomenon particularly endangers vegetables grown in open fields.Microplastics (MPs) have already infiltrated every terrestrial ecosystem—present in soil, water, and air alike. Laboratory studies confirm that plant roots uptake microplastics, transferring sub-micron and nano-sized particles from roots up into the shoots.Field measurements, however, have uncovered a more alarming reality: above…
4 days, 9 hours ago @ t.meOn this day, April 12, we celebrate one of humanity’s greatest milestones—when a human first left our planet and ventured into space. On April 12, 1961, Soviet cosmonaut Yuri Gagarin became the first person to orbit the Earth aboard the spacecraft Vostok 1.His legendary words—“Poyekhali!” (“Let’s go!”)—marked the dawn of the space age and a monumental achievement for science, courage, and international competition. Gagarin’s 108-minute journey turned him into a global icon and opened the door for all future space exploration.Happy Cosmonautics Day!#Gagarin #Space #USSR #science #history
1 week, 2 days ago @ t.meThe James Webb Space Telescope has achieved a groundbreaking astronomical milestone, capturing clear images of auroras on Neptune—a sight astronomers are already hailing as historic.Auroras occur when charged particles ejected by the Sun interact with a planet’s magnetic field, entering its upper atmosphere and creating a stunning luminous display.Hints of auroral activity on Neptune were first spotted by Voyager 2 back in 1989, but concrete evidence remained elusive. Over the decades, clear visuals of auroras emerged for Jupiter, Saturn, and Uranus, leaving Neptune as the mysterious missing link—until now.Thanks to James Webb’s exceptional sensitivity in the near-infrared range, astronomer…
3 weeks, 3 days 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.…
1 week, 4 days 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…
4 weeks, 1 day 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…
1 month, 1 week 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…
1 month, 3 weeks 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…
2 months ago @ t.me1945年4月16日,美国士兵踏上了德国萨克森州的科尔迪茨城堡桥(Colditz Castle Bridge)。这一天,战争已经进入尾声,但这个地方,却曾是纳粹用来关押盟军“最难对付战俘”的秘密堡垒。
3 days, 8 hours ago @ t.me法国,1956年Henri Cartier-Bresson 被誉为“决定性瞬间”的大师,是现代纪实摄影的奠基人之一。他善于用相机捕捉生活中一闪即逝的真实与诗意,很多作品看似随意,却构图精准、情感饱满。
5 days, 3 hours ago @ t.me咏苍髯 白发青丝一瞬间,年华老去向谁言。春风若有怜花意,可否许我再少年?
3 weeks, 2 days ago @ t.me