Tree cores pulled from some of the planet’s oldest trees have helped extend records of past weather.

A new 1,200 year-long time series based on tree rings shows that the current warming is unprecedented during this period. This is reported by researchers from the Swiss Federal Institute for Forest, ...

Perhaps you’ve wandered through a forest or strolled into a neighborhood park and found tree trunks — and wondered if counting the rings on a trunk is truly a way to know the tree's age. "Most of us ...