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כתבות אחרונות מאתר 'Phys'
Phys

Energy crisis coal switch increased emissions, illnesses and deaths across 6 countries‎

In addition to serious economic damage, the energy crisis of 2021/22 also had dramatic consequences for the environment and people's health. This is the conclusion reached by two researchers at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) in a new study. Although the temporary switch from gas to coal for producing electricity was cheaper and contributed to securing the energy supply, in the six European countries featured in the study, it caused additional costs of around one billion euros for the environment and health.

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Phys

Identifying dinosaurs from their footprints is difficult, but AI can help‎

When you hear the word "dinosaur," the first thing that might spring to mind is a hulking skeleton like Sue the T rex in Chicago's Field Museum or Sophie the Stegosaurus at the Natural History Museum in London. Dinosaur skeletons give us striking evidence of what these ancient animals looked like, from the plates and spikes on stegosaurs like Sophie to the long-necked, airplane-sized bodies of titanosaurs.

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Phys

How fire, people and history shaped the South's iconic longleaf pine forests‎

For thousands of years, one tree species defined the cultural and ecological identity of what is now the American South: the longleaf pine. The forest once stretched across 92 million acres from Virginia to Texas, but about 5% of that original forest remains. It was one of North America's richest ecosystems, and it nearly disappeared.

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Phys

Why some people speak up against prejudice, while others do not‎

When people encounter racism or discrimination, they don't all respond in the same way. Some calmly challenge the remark, some file a complaint, others confront the offender aggressively—and many say nothing at all.

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Phys

Biomass could play a key role in Canada's transition to a carbon-neutral economy‎

Record forest fires, under-utilized agricultural residues like straw and husks and struggling sawmills have left Canada with an abundance of undervalued biomass. If carefully and strategically managed, this resource could become a powerful ally in the fight against climate change.

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Phys

White men held less than half the board seats on the top 50 Fortune list for the third straight year‎

Historically, corporate boardrooms have been mostly white and mostly male. Yet the trend started shifting in the 1970s, in part due to gains from the civil rights era and pro-diversity efforts by activists and business groups.

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Phys

Want to ride your bicycle? Study highlights rise of Canada's bike network‎

A new Simon Fraser University study has found that Canada's cycling network is growing, but not everyone is benefiting. Between 2022 and 2024, nearly 3,600 kilometers of high-quality cycling infrastructure was added across the country, with the largest proportional increases seen in small- to medium-sized cities. But one consistent finding across Canadian cities is that areas with more children and older adults tend to have less cycling infrastructure.

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Phys

Reconfigurable robotic fish reveals how stiffness and wave propagation shape swimming performance‎

How can some fish, like tuna, achieve remarkable speed while others, like eels, excel in maneuverability? A research team from Peking University (PKU) has developed a novel robotic platform that sheds new light on this classic biomechanical puzzle.

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Phys

Cuttlefish use polarized light to create a dramatic mating display invisible to humans‎

Many organisms leverage showy colors for attracting mates. Because color is a property of light (determined by its wavelength), it is easy for humans to see how these colors are used in animal courting rituals. Less obvious to humans is the polarization of light—a property of light related to the direction the wave is oriented in. Humans can't perceive polarization, which may be why we weren't aware of the interesting way cuttlefish use it to attract mates.

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Phys

How defects make permanent magnets even more efficient‎

Rare-earth magnets are essential for electric motors in vehicles, drones, and trains, forming the backbone of modern, environmentally friendly mobility. These are not simple blocks of metal, but carefully engineered materials with a complex internal nanostructure composed of tiny building blocks called phases, each with its own crystal structure, chemistry, and physical properties. How magnetization behaves at the interfaces between these tiny building blocks and how well it resists demagnetizing forces ultimately determines the strength and stability of the magnet, and therefore the efficiency and reliability of the motor or generator.

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