By ALYSSA VAN DOORN The Outside Story The longer, warmer days of spring spark phenological changes in trees, from root to tip ...

Each horizontal bar represents the tree-ring pattern for one tree ... and dead samples from the long-lived bristlecone pine (the oldest one has been growing for a remarkable 4,600 years ...

The challenge is to find forests with both strong climate-growth relationships and trees over a century old — substantially ...

However, many old trees have long lost the core of their trunk, so scientists have to rely on both the rings they can see, as well as statistical models that project the total number of rings ...

Bristlecone rings, which vary in width year to year ... "in the persistent ability of a 4,000-year-old tree to shut up shop almost everywhere throughout its stem in a very dry year, and faithfully ...

Cobb Landmarks is partnering with the University of West Georgia to date Atlanta’s oldest remaining structures by examining the tree rings of the timber used in construction.

A slice of larix (larch) driftwood collected from Phippsøya, The Seven Islands, matched to an origin along the Lena River in Russia in the 1700s. The slice was sanded, revealing the preserved rings.

In Chile's ancient rainforest, the 'Gran Abuelo,' a 5,400-year-old tree, faces a new threat from a proposed highway. Scientists warn the road will increase the risk of wildfires and endanger the ...