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The psychology that can lead investors to make bad financial decisions

Say you buy shares in a company. The price climbs and months later you sell for a healthy profit. Ask why it worked, and the answer is often some version of "I made a good call." Now imagine the trade had lost money instead. Would you be as quick to blame your own judgment? Many of us wouldn't. We may point to bad timing, a jittery market, anything but ourselves.

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Diamond laser system achieves 100% optical contrast in magnetic-field readout

Researchers at Fraunhofer IAF have developed a laser-enhanced quantum sensor that combines high magnetic-field sensitivity with a large dynamic range. Using laser threshold magnetometry, they improved the ratio of sensitivity and dynamic range by a factor of up to 590 compared with state-of-the-art approaches. The breakthrough is enabled by the first demonstration of 100% optical contrast, combined with strong laser readout signals. The results, published in Nature Communications, open up new prospects for medical diagnostics, navigation, and resource exploration.

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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.

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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.

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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.

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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.

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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.

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Millions take fish oil for brain health. A two-year study found no benefit

A surprising two-year clinical trial found that fish oil supplements successfully delivered omega-3s to the brain but failed to improve memory or protect against Alzheimer's-related brain shrinkage. Researchers suspect that getting these nutrients through a healthy diet may offer benefits that supplements alone cannot provide.