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Scientists transformed blood cells from an 80-year-old into neural stem cells with a molecular age under 20, effectively reversing more than 60 years of cellular aging in the laboratory, ScienceDaily reported on October 21, 2026. The breakthrough offers a new method to investigate cellular rejuvenation mechanisms and could help researchers better understand age-related diseases like Alzheimer's. The discovery represents significant progress in cellular reprogramming and aging research.