Swirly lasers can control an ungovernable cousin of magnetism

Short pulses of light that impart rotation on a material’s atoms can be used to switch a property called ferroaxiality, which could let us build very stable and efficient memory devices ​Short pulses of light that impart rotation on a material’s atoms can be used to switch a property called ferroaxiality, which could let us …

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Hidden ecosystem of the ovaries plays a surprising role in fertility

A woman’s fertility declines with age, which is often attributed to a fall in egg number and quality, but the environment of the ovaries themselves may also be responsible ​A woman’s fertility declines with age, which is often attributed to a fall in egg number and quality, but the environment of the ovaries themselves may …

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Common medications may secretly rewire your gut for years

Drugs taken years—even decades—ago can leave lasting imprints on the gut microbiome, reshaping the community of microbes long after treatment stops. Scientists analyzing over 2,500 Estonian Biobank samples discovered that antibiotics aren’t the only culprits—antidepressants, beta-blockers, and anxiety medications also disrupt gut ecosystems. Some drugs from the same class even have different microbial effects. ​Drugs …

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Scientists shocked as birds soaked in “forever chemicals” still thrive

Tree swallows in polluted U.S. regions are accumulating high levels of “forever chemicals.” These durable pollutants, used in firefighting foams and consumer products, are found everywhere from soil to human blood. Surprisingly, researchers observed no significant impact on the birds’ reproduction, suggesting possible resilience in wild populations. ​Tree swallows in polluted U.S. regions are accumulating …

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A hidden “backup heater” that helps burn fat and boost metabolism

Scientists have uncovered a surprising new way the body can burn energy and stay warm. Deep inside fat tissue, they found a hidden system that helps the body use up calories, even without exercise. By studying mice, researchers discovered that brown fat — the type that keeps us warm — has a backup “heater” that …

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Viral apple cider vinegar weight loss study retracted for flawed science

BMJ Group has pulled a widely reported apple cider vinegar weight-loss study after experts uncovered major flaws in its data and analysis. Attempts to replicate the results failed, and irregularities raised questions about the trial’s reliability. The authors admitted mistakes and agreed to the retraction, while editors stressed the importance of transparency and warned against …

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Before they sucked blood, leeches were ocean hunters

A 430-million-year-old fossil has rewritten leech history, showing they are at least 200 million years older than previously believed. Unlike today’s bloodsucking leeches, their ancient ancestors likely hunted small marine animals using a tail sucker rather than piercing skin. ​A 430-million-year-old fossil has rewritten leech history, showing they are at least 200 million years older …

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Top 250 oil and gas firms own just 1.5% of the world’s renewable power

Despite public promises by many fossil fuel firms that they are investing in the green transition, it turns out that they have made little contribution to the growth of renewable energy ​Despite public promises by many fossil fuel firms that they are investing in the green transition, it turns out that they have made little …

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King Richard III’s oral microbiome hints he had severe gum disease

The skeleton of King Richard III, which was found beneath a car park more than a decade ago, has well-preserved teeth, allowing scientists to sequence his oral microbiome ​The skeleton of King Richard III, which was found beneath a car park more than a decade ago, has well-preserved teeth, allowing scientists to sequence his oral …

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