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Life may have started in sticky, rock-hugging gels rather than inside cells. Researchers suggest these primitive, biofilm-like materials could trap and concentrate molecules, giving early chemistry a protected space to grow more complex. Within these gels, the first hints of metabolism and self-replication may have emerged.
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For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the third known interstellar comet ever spotted. When scientists turned NASA’s Swift Observatory toward it, they caught the first-ever hint of water from such an object, detected through a faint ultraviolet glow of hydroxyl gas. Even more surprising, the comet was blasting out water at a rate of about 40 kilograms per second while still far from the Sun—much farther than where most comets “switch on.”
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Three major reviews commissioned by the World Health Organization find that GLP-1 drugs including tirzepatide (sold as Mounjaro and Zepbound), semaglutide (Ozempic and Wegovy), and liraglutide (Victoza and Saxenda) can lead to substantial weight loss in people with obesity. But while the results are impressive, researchers caution that most trials were funded by drugmakers, long term safety data are still limited, and side effects such as nausea are common.
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A distant star system with four super-sized gas giants has revealed a surprise. Thanks to JWST’s powerful vision, astronomers detected sulfur in their atmospheres — a chemical clue that they formed like Jupiter, by slowly building solid cores. That’s unexpected because these planets are far bigger and orbit much farther from their star than models once allowed.
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Avian malaria is spreading across Hawaiʻi in a way scientists didn’t fully grasp until now: nearly every forest bird species can help keep the disease alive. Researchers found the parasite at 63 of 64 sites statewide, revealing that both native honeycreepers and introduced birds can quietly pass the infection to mosquitoes—even when carrying only tiny amounts of it. Because infected birds can remain contagious for months or even years, transmission keeps simmering almost everywhere mosquitoes exist.
