The broiling summer of 2023 was the hottest in the Northern Hemisphere in more than 2,000 years, a new study found. When the temperatures spiked last year, numerous weather agencies said it was the ...

The UA has plenty of special features to offer, but one of its more overlooked aspects is its abundant plant life—specifically, that of the Laboratory of Tree-ring Research. UA’s tree-ring lab right ...

Discovering evidence of deadly deluges of snow from the past could help protect people on mountains around the world, researchers say. By Katherine Kornei A rumble, a deluge of snow and then silence — ...

For those who can read them, tree rings offer a glimpse into the past. Christopher Roos is one of those people, and he’s using them to shed light on a story that reveals how Western Apache tribes have ...

Weather patterns like heat waves or dry spells can sometimes stall over one region. A new University of Arizona study found clues about why. The researchers analyzed tree rings from centuries-old ...

Douglass' original collection forms the core of the tree-ring lab's archive, which has grown into the world's largest collection of ancient timbers, with more than 2 million specimens ranging from ...

Two hundred and forty-one years ago, when General George Washington marched back into New York City as British troops were walking out, a volcano erupted in Iceland. For eight months in 1783, Laki ...