How extreme weather leaves a lasting mark on trees and shrubs POZNAŃ, Poland — In the Arctic’s harsh borderlands, where trees ...

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’ ...

Dendrochronology, from the Greek words for “tree” (dendros) and “time” (chronos), uses tree rings to study the histories of forests, the climate, and human civilizations, as well as the links among ...

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