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Continue to ChatTree rings show record of newly identified extreme solar activity event https://climate-science.press/2021/07/14/tree-rings-show-record-of-newly-identified-extreme-solar-activity-event/
Tree rings show record of newly identified extreme solar activity event https://climate-science.press/2021/07/14/tree-rings-show-record-of-newly-identified-extreme-solar-activity-event/