According to Peter Brown, the founder of Rocky Mountain Tree-Ring Research, which curates a catalog of the world’s oldest scientifically verified trees, the most precise age estimates for ancient ...

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The scientists collected core samples from 25 Scots pine trees and stem discs from 54 juniper shrubs, creating paper-thin ...

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Volcanic eruptions and cold summers leave lasting marks in the wood of northern trees, unlocking the secrets of past climate extremes.

Blue growth rings in woody plant stems indicate years when cells failed to lignify properly due to summers that were too cold ...

In Norway, scientists have found blue rings in trees that hint at how volcanic eruptions disrupted growth throughout history.

Trees need a certain number of warm days in their growing seasons to grow properly; otherwise, the cell walls of new growth ...

Scientists studying pine trees and juniper shrubs in northern Scandinavia are revealing the weather of the past by looking at tree rings — which can tell us far more than just the trees’ age. ‘Blue’ ...