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Continue to ChatSolar activity drops to 100-year low, puzzling scientists https://clinicalnews.org/2013/09/19/solar-activity-drops-to-100-year-low-puzzling-scientists/
Solar activity drops to 100-year low, puzzling scientists https://clinicalnews.org/2013/09/19/solar-activity-drops-to-100-year-low-puzzling-scientists/