Western Apache fire management once reshaped Arizona’s forests — and tree rings prove it. A new study combining tree-ring ...

A relentless drought across Arizona has left people who hunt acorns finding smaller harvests and weaker trees.

A study done in collaboration with multiple universities, including the University of Arizona, analyzed tree rings to prove ...

In his monumental “The Undiscovered Country,” Mr. Hutton presents the rich and complex story of the westering American ...