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כתבות אחרונות מאתר 'Phys'
Phys

Cells that are not our own may unlock secrets about our health‎

During pregnancy, maternal and fetal cells migrate back and forth across the placenta, with fetal cells entering the mother's bloodstream and tissues. They can settle in maternal organs such as the thyroid, liver, lungs, brain and heart—and can persist there for decades. Conversely, maternal cells can enter the fetus and be passed down to future generations, essentially creating a lifelong connection between mothers, their offspring and their descendants.

01:35
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Phys

Paying attention to birdsong while walking in nature can boost well-being, my research shows‎

There's no question that being in nature is good for well-being. Research shows that experiencing nature and listening to natural sounds can relax us.

01:35
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Phys

Sharktober: Scientists confirm spike in tiger shark bites in October‎

New University of Hawaiʻi research confirms that "Sharktober" is real, revealing a statistically significant spike in shark bite incidents in Hawaiian waters every October. The study, which analyzed 30 years of data (1995–2024), found that about 20% of all recorded bites occurred in that single month, a frequency far exceeding any other time of the year.

01:35
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Phys

New analysis disputes historic earthquake, tsunami and death toll on Greek island‎

For decades, researchers thought that an October 1843 earthquake on the small Greek island of Chalke caused a powerful tsunami and led to the deaths of as many as 600 people. But a new analysis of primary accounts of the event by Ioanna Triantafyllou at Hellenic Mediterranean University suggests the truth was much less dramatic and destructive.

01:35
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Phys

Tungsten carbide phase control: Engineering a low-cost alternative catalyst for producing sustainable petrochemicals‎

Important everyday products—from plastics to detergents—are made through chemical reactions that mostly use precious metals such as platinum as catalysts. Scientists have been searching for more sustainable, low-cost substitutes for years, and tungsten carbide—an Earth-abundant metal used commonly for industrial machinery, cutting tools, and chisels—is a promising candidate.

00:23
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Phys

Meadows reveal unexpected monotony in insect biodiversity study‎

According to a new study by the University of Würzburg, Bavarian meadows are the most monotonous insect habitats. Surprisingly, fields and settlements often offer more diversity than grassland.

00:23
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Phys

Biofilm streamers harden under flow, making bacterial infections harder to treat‎

Whether in the human body or on surfaces, bacteria protect themselves from outside attackers using biofilms. Physicist Eleonora Secchi is researching how these slime-like protective films are formed, with the aim of making it easier to remove pathogenic bacteria.

00:23
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Phys

Climate adaptation may ease migration pressures in Africa‎

Africa confronts escalating internal migration and displacement crises fueled by intensifying climate hazards—particularly prolonged droughts—and persistent armed conflicts, which compound vulnerabilities across the continent.

00:23
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Phys

Cellulose-based composite sheet exhibits simultaneous adsorption and shielding of radioactive elements‎

Researchers at University of Tsukuba have developed a cellulose-based composite sheet that integrates paper pulp with starch, polyaniline (a conductive polymer), Prussian blue (a coordination compound), and alginic acid (a natural polysaccharide). These components were assembled into layered structures using a traditional papermaking technique. The resulting sheet exhibits efficient simultaneous adsorption and immobilization of radioactive elements, including cesium, iodine, and strontium.

00:23
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Phys

Hubble uncovers the secret of blue straggler stars that defy aging‎

Some stars appear to defy time itself. Nestled within ancient star clusters, they shine bluer and brighter than their neighbors, looking far younger than their true age. Known as blue straggler stars, these stellar oddities have puzzled astronomers for more than 70 years. Now, new results using the NASA/ESA Hubble Space Telescope are finally revealing how these "forever young" stars come to be and why they thrive in quieter cosmic neighborhoods.

00:23
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