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The Spokesman-ReviewThe Spokesman-Review on 2021-06-07 15:00

Revealing ancient secrets: 1,000 years of tree rings in Yellowstone show recent climate warming trend - Mon, 07 Jun 2021 PST

Like careful note-takers during the past 1,250 years, Engelmann spruce trees high in the Yellowstone National Park backcountry have left behind a ...

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