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כתבות אחרונות מאתר 'Phys'
Phys

Dynamic population breeding improves turquoise killifish husbandry‎

Originally from southeastern Africa, the turquoise killifish (Nothobranchius furzeri) lives in seasonal bodies of water that form during the rainy season and disappear again during the dry season. The fish is highly adapted to this seasonal cycle: It completes its entire life cycle—from hatching through reproduction to natural death—within a few months. Its short lifespan makes it a valuable model organism for aging research, as processes that often take years in other vertebrates can be studied in killifish within a few weeks.

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Phys

X-pinch plasma achieves radial proton acceleration for crisp imaging‎

Plasma pinches: From pursuits of nuclear fusion to an attractive point source of accelerated protons for proton radiography.

00:01
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Phys

Older adults are at risk in heat waves, but it's not just age: How public systems and policies are failing them‎

Five years ago, British Columbia's heat dome became one of the deadliest weather disasters in Canadian history.

23:41
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Phys

Scientists discover rare 'super-Jupiter' planet with 180-day long orbit‎

Scientists from Queen's University Belfast have led an international team in the discovery of a rare new planet, which is larger than Jupiter and orbits a distant star every 180 days. Named NGTS-38 b, it is an exoplanet—a planet that orbits a star beyond our solar system. It is about 8% larger than Jupiter and almost five times more massive. Planets of this size and mass are often referred to as "super-Jupiters."

23:41
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Phys

Astronomers dig deep to find tiny dangerous space debris‎

In a new study, published in the Journal of the Astronautical Sciences, Warwick researchers led an international effort to uncover some of the faintest debris in geosynchronous orbit ever observed, finding fragments as small as 5 centimeters (2 inches) and obtaining valuable data to characterize their behavior.

23:35
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Phys

The language of play: Hyenas use facial expressions and vocalizations to de-escalate‎

Scientists observed spotted hyenas (Crocuta crocuta) playing in the wild and found that their precise, sophisticated communication is on par with that of many primate species. Hyenas play and romp with one another at all stages of life. Although juveniles play more frequently than adults, the joy of play can also be observed in adults. Interestingly, adult hyenas appear to particularly enjoy playing in water.

23:22
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Phys

Heat-shrinking materials get cleaner production route with lower temperatures and finer particles‎

Among the many modern technologies that shape life today, functional oxide materials are found in almost everything, from advanced electronics to energy-efficient systems. Functional oxides with high-valent metal ions are a significant topic of interest because of their unusual properties, such as superconductivity, magnetism, ferroelectricity and negative thermal expansion (NTE). However, manufacturing these materials often requires harsh chemical conditions that raise safety concerns and produce environmentally harmful byproducts.

23:22
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Phys

Image: Hubble captures star-studded cluster‎

This image from NASA's Hubble Space Telescope showcases Messier 3 (M3), one of the Milky Way's most massive globular clusters, or spherical collections of gravitationally bound stars.

23:01
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Phys

New CRISPR method makes it possible to control protein production in cells‎

The speed at which a cell produces proteins is a decisive factor in determining whether it divides, specializes or retains its stem cell properties. A team of researchers led by Professor Stefan H. Stricker, professor of epigenetic engineering at LMU's Biomedical Center and research group leader at Helmholtz Munich, has worked with international partners to demonstrate directly for the first time that the amount of ribosomal RNA (rRNA) directly regulates these processes. Their results were published in the journal Science.

23:01
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Phys

Caddisfly silk gene evolves quickly without losing adhesive power‎

Caddisflies are among nature's master underwater builders, capable of spinning sticky silk that they use to form protective cases and webs in freshwater streams. Scientists like the University of Utah's Russell Stewart have long studied this bioadhesive material in the hope of using it as a chemical model for creating a synthetic version for use in the human body in medical applications. Now the genetics of caddisflies' evolutionary superpower is coming into focus, providing science with new clues for developing bioadhesives.

22:42
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