Найстаріше дерево України - дуб Максима Залізняка.
Цьому дубу понад 1100 років.
Він бачив хрещення Русі, Батия, козаків і смартфони. Дуб Максима Залізняка росте в селі Буда на Черкащині, посеред Холодного Яру.
Його обхват - 9 метрів.
Ukrainian mathematician Maryna Viazovska solved a problem that had puzzled mathematicians for over 400 years. Even Johannes Kepler and Isaac Newton couldn’t crack it.
We live in a three-dimensional world, but Maryna solved a puzzle in an eight-dimensional space—something that’s very hard even to imagine.
She was born in Kyiv, studied at Taras Shevchenko University, worked in Bonn and Berlin, and at just 33 became a professor in Lausanne.
So what was the problem? It’s about how to pack identical spheres as tightly as possible in space. This question was first asked by Kepler back in 1611. Over time, scientists found answers for two and three dimensions—but not for eight.
Maryna proved that in eight dimensions, the densest packing is formed by a special mathematical structure called a lattice. What’s even more amazing is that she did it in just 23 pages, while earlier attempts took hundreds.
In 2022, she was awarded the Fields Medal, the most prestigious prize in mathematics. She became only the second woman in history to receive it.
Today, Maryna Viazovska works in Lausanne, supports Ukrainian mathematicians, and brings pride to Ukraine with her achievements.
@Math_files I ask you to mention under this post the talented young Ukrainian teacher, mathematician and volunteer, winner of the European Mathematical Olympiad among girls, Yulia Zdanovska, who was killed by the Russians as a result of shelling of peaceful civilian homes in Kharkiv.
NASA’s Curiosity rover just captured something truly magical on Mars: rare, iridescent “mother-of-pearl” clouds shimmering high in the alien sky!These aren’t ordinary clouds. While Earth’s clouds are made of water droplets, these Martian beauties are formed from dry ice — frozen carbon dioxide crystals floating at dizzying altitudes where temperatures plunge to unimaginable lows.What makes them absolutely breathtaking is the rainbow-like glow. As the Sun slips below the horizon, the last rays of sunlight catch the tiny, perfectly uniform ice crystals, scattering light into vivid, shifting colors of pink, blue, and green. The result? A spectacular iridescent display that looks more like cosmic art than weather.These clouds only appear briefly during specific seasons on Mars, glowing brightest right after sunset when the sky turns deep purple and the crystals act like floating https://t.co/5EWXFYIpPN’s a stunning reminder of how strange and beautiful the Red Planet can be — a world where clouds are made of frozen CO₂ and sunsets paint the heavens with otherworldly rainbows.What other rare space weather phenomena or breathtaking celestial events would you love to see captured by our rovers on Mars? Drop your ideas in the comments! Image Credit: NASA / JPL-Caltech / MSSS
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Karoline Leavitt: "we had a very stupid and incompetent leader in this White House for four years who gave away many of our best weapons for nothing, for free, to another country very far away by the name of Ukraine."
Honestly, the sheer heartlessness, ruthlessness, and cruelty of saying that while we are still under attack, trying to survive. While entire families are being killed in russian bombings due to a lack of air defense missiles, and when we barely survived last winter’s humanitarian catastrophe caused by russian strikes on our infrastructure. I don’t know... I’m just stunned.
Honestly, I’m genuinely stunned by the sheer amorality and the complete absence of even a drop of conscience.
And the most astonishing part is the sheer pointlessness of this demonstrative repetitive disgrace. The total pointlessness of this absurd lies and smearing of Ukraine -- for absolutely nothing.