FLAGSTAFF, AZ — The electric blue sky frames a stand of ponderosa pines – their ramrod trunks picket the forest floor as sunlight floods the ground. A breeze tickles the green needles, mingling dust ...

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

As Emory oak trees in parts of Arizona disappear, members of several Apache tribes are working on a collaborative plan with the U.S. Forest Service and researchers to preserve them. Emory oak trees ...

Many of us head for mountain forests as summer heat comes on - and a new book by a Tucson author could enrich your experience in the cool, green woods. "Mountain Trees of Southern Arizona: A Field ...

FLAGSTAFF, Ariz. – Aerial surveys of forested land in Arizona and New Mexico show large swaths of dead trees after an unusually dry winter that aided pests such as bark beetles. Arizona saw its ...

A major conversation in the realm of climate change is on the ability of trees and forests to fight it. Many postulate that restoring the abundance of trees could have “mind-blowing potential” to deal ...

Arizona is looking at its largest uptick in tree mortality since the early 2000s when about 1.7 million acres were affected. New Mexico saw a similar pattern, though surveys done earlier this year don ...