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Helping care for grandchildren may offer an unexpected boost to brain health later in life. Researchers found that grandparents who provided childcare scored higher on memory and verbal skills than those who did not. The effect did not depend on how often they helped or the type of care they provided. Being involved as a caregiver itself appeared to matter most.
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Drinking heavily over many years is linked to a higher risk of colorectal cancer, especially rectal cancer, according to new research tracking U.S. adults for two decades. People who drank heavily throughout adulthood faced sharply higher risks than light drinkers. Former drinkers did not show increased cancer risk and had fewer precancerous tumors. The results suggest that quitting alcohol may help lower long-term cancer risk.
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Scientists have created a device that captures carbon dioxide and transforms it into a useful chemical in a single step. The new electrode works with realistic exhaust gases rather than requiring purified CO2. It converts the captured gas into formic acid, which is used in energy and manufacturing. The system even functions at CO2 levels found in normal air.
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Ozempic, Mounjaro, and Zepbound can drive impressive weight loss, but stopping them is often followed by rapid weight regain. Researchers found that people regain weight faster after quitting these drugs than after diet and exercise alone. Improvements in heart health and diabetes risk also tend to reverse within a few years. The results suggest long-term success may require more than medication alone.
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Low-Earth orbit is more crowded—and fragile—than it looks. Satellites constantly weave past each other, burning fuel and making dozens of evasive maneuvers every year just to stay safe. A major solar storm could disable navigation and communications, turning that careful dance into chaos. According to new calculations, it may take just days—not decades—for a catastrophic chain reaction to begin, potentially choking off humanity’s access to space for generations.
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JWST has revealed a strange early universe filled with ultra-bright “blue monster” galaxies, mysterious “little red dots,” and black holes that seem far too massive for their age. A new study proposes that dark stars—hypothetical stars powered by dark matter—could tie all these surprises together. These exotic objects may have grown huge very quickly, lighting up the early cosmos and planting the seeds of supermassive black holes.
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Scientists at KAIST have found a way to turn a tumor’s own immune cells into powerful cancer fighters—right inside the body. Tumors are packed with macrophages, immune cells that should attack cancer but are usually silenced by the tumor environment. By injecting a specially designed drug directly into tumors, researchers were able to “reprogram” these dormant cells to recognize and destroy cancer.
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Researchers have developed smart nanoparticles that can seek out and destroy disease-causing proteins the body can’t normally eliminate. Unlike traditional drugs, these particles can reach hard-to-access tissues, including the brain, and precisely target problem proteins without widespread side effects. Early results show promise against major cancer drivers, and the platform is designed to be easily adapted to many diseases. The work could reshape the future of precision medicine.
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Cancer immunotherapy has been a game-changer, but many tumors still find ways to slip past the immune system. New research reveals a hidden trick: cancer cells can package the immune-blocking protein PD-L1 into tiny particles that circulate through the body and weaken immunotherapy’s impact. Scientists in Japan discovered that a little-known protein, UBL3, controls this process—and surprisingly, common cholesterol-lowering drugs called statins can shut it down.
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A massive international study of more than 3,100 long COVID patients uncovered a striking divide in how brain-related symptoms are reported around the world. In the U.S., the vast majority of non-hospitalized patients described brain fog, depression, and anxiety, while far fewer patients in countries like India and Nigeria reported the same issues. The difference doesn’t appear to be about the virus itself, but about culture, stigma, and access to mental health care.