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כתבות אחרונות מאתר 'Phys'
Phys

A cheaper way to fight 'forever chemicals': How pH-controlled traps could clean drinking water‎

Forever chemicals don't break down and don't disappear, but Florida International University scientists have developed a safer, cheaper, and reusable solution that could remove these chemicals. FIU chemistry professor Kevin O'Shea and chemistry Ph.D. candidate Rodrigo Restrepo Osorio have created a new cleanup approach that captures and releases PFAS chemicals on demand by using water's own pH level.

01:07
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Phys

A light-controlled 'muscle' could give synthetic cells a new way to move‎

Engineers interested in creating artificial cells to deliver drugs to unhealthy parts of the body face a key challenge: for a cell-like system to move, change shape, or divide, it needs a way to generate force on command.

00:15
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Phys

Archaeologists have discovered 12,000‑year‑old dice. Here's what they reveal about the history of play‎

Humans have always been playful. But for much of our history, play has left little trace. Unlike tools or bones, games rarely preserve and the fleeting pleasures they produce are even harder to recover.

00:15
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Phys

Wafer-scale 2D magnetic films emerge thanks to a new low-defect growth technique‎

In a major advance, researchers at the Indian Institute of Science (IISc) have devised a method to grow high-quality 2D magnetic materials (2D-MMs) over centimeter-scale wafers. Earlier approaches in the field were limited to growing micrometer-sized flakes. This advance paves the way for their integration into next-generation electronics and spintronics materials used in hard drives and sensors.

23:12
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Phys

'Protected' seagrass meadows aren't necessarily healthy, because pollution doesn't stop at the shoreline‎

I spent last summer wading through seagrass meadows across Northern Ireland, from the sheltered waters of Strangford Lough to the exposed coast at Waterfoot Bay. I was collecting seagrass leaves and testing them for nitrogen pollution. Every meadow I visited sits inside a marine protected area—a stretch of sea that's been given legal protection to safeguard the wildlife living there. And every single one was polluted beyond the limit for healthy seagrass.

22:34
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Phys

Sulfur-rich Mercury magmas behave differently than Earth's do‎

Mercury is a small, rocky planet about which researchers know relatively little. Two missions, taking readings as they passed over the planet, have revealed that Mercury is covered by an iron-poor and sulfur-rich crust. It is also reduced, a chemical state in which the substances have gained electrons. In fact, it's the most reduced planet in the solar system.

22:01
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Phys

Moroccan dinosaur's fearsome tail spikes evolved much earlier than we thought—new discovery‎

In the heart of the Middle Atlas Mountains in central Morocco, a global team of paleontologists and geologists has discovered new remains of a very unusual dinosaur. It belonged to the group called ankylosaurs, plant eaters whose bodies were covered in bony plates.

21:31
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Phys

How tiny voids could make fusion targets more stable under powerful shockwaves‎

Picture two materials sandwiched together. The boundary between them may appear flat, but, in reality, it is full of tiny bumps and dents. Suddenly, the materials are hit with a shockwave. If that wave hits a bump in the material interface, it slows down. If it hits a dent, it accelerates forward. This imbalance creates fast, narrow jets of material—called the Richtmyer-Meshkov (RM) instability.

21:04
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Phys

Why anatomy's naughtiest mnemonics work so well‎

Some lovers try positions that they can't handle—I'm referring to the bones of the wrist, of course. The phrase is a classic mnemonic used to remember the eight carpal (wrist) bones—scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate and hamate—whose initials form the memorable sentence.

20:06
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Phys

These blazing blue explosions may be born when a compact dead star slams into a Wolf-Rayet star‎

Luminous fast blue optical transients (LFBOTs) are among the universe's brightest and fastest explosions but their origin is not completely understood. A new study takes a closer look at the galaxies they occur in, offering two important clues about their nature. A paper outlining these results was uploaded to the preprint server arXiv on March 24.

20:06
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