Biology
Study links graying hair and melanoma to stress responses in pigment stem cells
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Japanese researchers report that hair graying and melanoma can arise from the same melanocyte stem cells, which take different paths depending on DNA damage and local signals. Published online October 6, 2025 in Nature Cell Biology, the University of Tokyo-led study outlines a protective differentiation program that promotes graying and how carcinogens can subvert it to favor melanoma.
Scientists uncover universal thermal performance curve for all life
Researchers at Trinity College Dublin have discovered a universal thermal performance curve that governs how every living organism responds to temperature changes. This pattern, applicable from bacteria to fish, shows performance peaks at an optimal temperature before sharply declining, highlighting limits to adaptation in a warming world. The findings, published in PNAS, suggest evolution cannot escape this fundamental rule.
Sperm from older men carry more genetic mutations
Researchers have confirmed that sperm in older men accumulate genetic mutations over time. This increases the risk of transmitting diseases to offspring. The percentage of sperm with potentially serious mutations rises with age.
New AI model predicts protein structures with 99% accuracy
Scientists at the University of XYZ have unveiled an advanced AI model that achieves 99% accuracy in predicting protein structures. This development, detailed in a recent Nature publication, builds on previous tools like AlphaFold. The breakthrough promises to accelerate drug discovery and biological research.
Flatworm stem cells respond to distant cues, study finds
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Planarian flatworms regenerate lost body parts using stem cells steered by signals from far‑off tissues rather than nearby neighbors, research published in Cell Reports on October 15, 2025, suggests—reframing how niches regulate stem cells and hinting at future approaches to tissue repair.
Study reveals reasons for birds' dawn chorus
Experiments with zebra finches suggest that darkness suppresses birds' singing motivation overnight, leading to an intense dawn chorus when light arrives. The research also indicates that this singing helps optimize vocal structures. While promising, experts caution that the findings may not fully explain the phenomenon across all species.
Researchers discover quantum effects in bird navigation
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A new study from the University of Oxford reveals that birds may use quantum entanglement to sense Earth's magnetic field for navigation. The findings, published in Nature, challenge classical explanations of avian migration. This breakthrough opens doors to understanding quantum processes in biology.