Tree rings data help reconstruct Sun's activity -- Science & Technology -- Sott.net
Astronomers are using tree rings as a historical record of solar activity — and they've found that the Sun was much more active in the past. Our Sun is not the faithfully constant light source it appears to be. Solar activity varies in a fairly...
Galileo Galilei Samuel Heinrich Schwabe Dynamics Observatory Nature Geoscience Ring Plot Little Ice Age
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