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כתבות אחרונות מאתר 'Phys'
Phys

Locked-in food system slows Europe's green shift, article warns‎

Europe's agrifood system is under severe pressure. Climate change is causing droughts and floods, and agriculture is putting pressure on nature, the climate and the environment. Diet-related lifestyle diseases are placing a growing burden on health care systems. At the same time, agriculture is expected to deliver affordable food, climate action, biodiversity and food security all at once while maintaining competitiveness in a global market.

05:46
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Phys

How heavy can a neutron star get?‎

The physics of neutron stars are almost too fantastic to believe: something the weight of two suns compacted to a sphere the size of a city. Each teaspoon of its material would weigh billions of tons. If you've done any reading on the topic, you've heard these facts before. But despite the intense interest these extreme objects hold, we are still actively learning lots about them.

05:05
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Phys

Wetlands loss has increased residential flood insurance claim payments by $10 billion across the US, study finds‎

A new study published in Nature Water finds that wetland loss across the United States has increased residential flood insurance claim payments by more than $10 billion since 1985, underscoring the critical role wetlands play in reducing riverine flood damage.

04:07
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Phys

Terahertz imaging maps spatial chirality in materials with 100-micrometer resolution‎

In nature, there exist structures that are mirror images of each other but cannot be perfectly superimposed. These are known as chiral objects, derived from the Greek word for "hand," since left and right hands share the same relationship. Although similar in structure, chiral molecules exhibit different behaviors, and chirality is central to life itself. DNA has a twisted chiral structure, and living organisms prefer one handedness over the other. This distinction is equally important in drug design, materials science, and nanotechnology.

04:07
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Phys

Violent rocket particles could reshape future spacecraft design‎

When rockets fire into space, the insides of their engines become an extreme environment where temperatures soar and tiny particles are thrown around at hypersonic speeds. These particles behave in ways that break long-held assumptions, according to new research that could help improve the durability, safety and performance of future space and defense technologies.

03:45
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Phys

Girl power: Red-shouldered hawk parents invest more in female offspring‎

A new study published in the Journal of Raptor Research, titled "Factors Influencing Nestling Sex Ratios of Suburban and Rural Red-Shouldered Hawks, 2004–2016," finds that hawk parents prioritize producing female offspring when conditions are optimal. This means that higher quality territories could result in more females, offering biologists clues about habitat health, which is important intel as the species adapts to urban environments with increasing frequency.

03:27
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Phys

Leafy camouflage reshapes katydid love songs, making males more attractive to females‎

New research from the University of St Andrews has discovered that insects who conceal themselves as leaves also use their leafy camouflage to amplify mating calls, making themselves more attractive to the opposite sex. The research published in Proceedings of the Royal Society B is the first demonstration of how impressive leaf mimicry can also be used to enhance the attractiveness of a sexual signal.

03:13
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Phys

Ötzi the Iceman and his microbiome—a 5,300-year-old relationship‎

Researchers at Eurac Research have obtained a detailed picture of the microbial community associated with Ötzi, Europe's oldest known natural human mummy. The study provides insights into a complex microbiome, ranging from the gut flora of a Copper Age human to cold-adapted yeasts.

03:01
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Phys

Sharks thrive in hotspots of prey, underlining need for holistic approach to conservation‎

Sharks need healthy habitats, and some have a strong preference for locations jam-packed with food, according to FIU research. A recent study of Caribbean reef sharks in the Bahamas, where shark fishing has been banned for years, shows that the sharks don't seem to like places where prey is hard to find. Instead, they prefer to live where prey is most abundant. The research is published in the journal Animal Conservation.

03:01
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Phys

Biomaterial made from jackfruit latex is a promising treatment for periodontitis‎

Researchers from the Faculty of Medical and Health Sciences (FCMS) at the Pontifical Catholic University of São Paulo (PUC-SP) in Sorocaba, in the interior of the state of São Paulo, Brazil, have developed a biomaterial containing jackfruit latex, pomegranate peel extract, and simvastatin (a statin-based medication) that shows promising efficacy in treating periodontitis.

02:46
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