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כתבות אחרונות מאתר 'Phys'
Phys

Entrepreneurs live longer than salaried workers, study reveals‎

Conventional wisdom suggests that the long hours and pressures of entrepreneurship can take a toll on health. But new research by Cristiano Bellavitis, associate professor in the School of Business at Stevens Institute of Technology, and his collaborators finds that entrepreneurs tend to live longer than people who spend their careers working for others.

21:03
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Phys

Quantum interference traps electron waves in metal for first time‎

Ever since quantum mechanics first described particles, like electrons, as rippling waves, researchers have wondered if those waves could be trapped in place. Writing today in Science a century later, a team of Columbia University researchers reports waves of electrons becoming trapped for the first time in a metal called Pd₅AlI₂.

21:03
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Phys

Global warming may have halted an emerging ice age, study suggests‎

Two thousand years ago, the Arctic remnants of a once-vast ice sheet started to grow again. It was the beginning of a new glacial period, more conversationally known as the next ice age—but by the 1960s, summer temperatures were already so high that the ice sheet started to shrink. In other words, global warming ended a period of glaciation that had already begun.

21:03
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Phys

Earth's hemispheres may have worked together to drive past ice ages‎

New research from the University of St Andrews has uncovered a previously unknown process that may have helped drive Earth into past ice ages. Published today (Oct. 22) in the Journal of Climate, the paper links ice sheets in the Northern Hemisphere to changes in ocean circulation and sea ice in the Southern Hemisphere understood to drive down atmospheric CO₂. Linking these two key features of the ice ages has long been a challenge, given how far apart the two regions are.

21:03
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Phys

Webb captures stars in the early stages of life in a nearby stellar nursery‎

The NASA/ESA/CSA James Webb Space Telescope continues to reveal hidden parts of the cosmos with its advanced suite of infrared instruments. In a newly released image, Webb revealed many stars previously hidden by the dust clouds of NGC 7129, a stellar nursery about 3,300 light-years from Earth in the constellation Cepheus. The image is already improving our understanding of how new stars are born and evolve with time.

20:43
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Phys

Webb image reveals young stars brewing in a nebulous cauldron‎

In this Picture of the Month from the NASA/ESA James Webb Space Telescope, we visit a turbulent cauldron of star formation to see what is brewing inside dense clumps of gas. This is a star-forming region named LHA 120-N 159, or simply N159, located 161,000 light-years away in the Large Magellanic Cloud (LMC), one of the satellite galaxies orbiting the Milky Way galaxy. This image spans about 230 light-years across.

20:43
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Phys

Mosquito bites are more complicated than they appear—getting a closer look might lead to better disease prevention‎

Female mosquitoes need blood to produce eggs. While much research has focused on how these hungry mosquitoes find their targets, less is known about what happens after they land on skin. Yet, a better understanding may allow researchers to find new ways of preventing bites that transmit diseases like malaria and dengue.

20:21
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Phys

When climate data is transformed into visuals, some people and places get overlooked‎

When a climate disaster happens, people thousands of miles away may encounter it through numbers: how many people died, how many were displaced, how many homes were destroyed and how much infrastructure was damaged. But for the people living through it, the disaster is not a data set. It is a home, a family, a livelihood and a place.

20:21
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Phys

Wildfires cause Amazon to emit 1.17 billion more metric tons of CO₂ than it absorbs‎

From 2010 to 2024, the Amazon rainforest—the largest tropical rainforest on the planet—released an average of 1.17 billion metric tons more carbon dioxide (CO₂) into the atmosphere than it absorbed each year. Wildfires were the main source, emitting approximately 1.47 billion metric tons of CO₂ per year—far exceeding the forest's absorption capacity of 300 million metric tons per year.

20:07
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Phys

Four ways cities can help protect democratic values‎

When people think about democracy, they tend to think about national elections, parliaments or the policies of national governments. Even the recent special election in Holborn and St Pancras showed that democratic events are often framed around what they mean for the fortunes of national leaders, rather than what they mean for daily life within a community.

20:07
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