
斑马线,又名「横道世之介」。
6 hours 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…
5 days, 16 hours ago @ t.meOlivia Farnsworth: The Girl Who Feels No Pain, Hunger, or FatigueOlivia Farnsworth from the UK is a unique medical case—she doesn’t feel pain, hunger, or fatigue. This rare condition is caused by a deletion in her 6th chromosome, meaning a segment of the chromosome is missing. She is believed to be the only person in the world exhibiting all three symptoms simultaneously.The inability to feel pain is the most dangerous aspect of her condition, as she could sustain serious injuries without realizing it. Her family must constantly monitor and protect her. Additionally, her mother ensures she eats regularly, as Olivia doesn’t experience hunger signals and could easily forget to eat.Sleep is an…
2 weeks, 6 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…
1 week, 2 days 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 weeks, 2 days 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 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…
1 month, 2 weeks ago @ t.me#艺术品 《圣母之死》(The Death of the Virgin) 是意大利画家 卡拉瓦乔(Caravaggio) 于 1606年创作的一幅著名宗教油画。以现实与强烈光影展现圣母之死的哀痛氛围。
3 days ago @ t.me