Medieval records of the northern lights extending as far as Japan have led researchers to evidence for a powerful burst of ...

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 ...

Last year's summer was the hottest in 2,000 years, ancient tree rings reveal. Researchers already knew that 2023 was one for the books, with average temperatures soaring past anything recorded since ...

A new study leveraging 20,000 tree-ring records and nearly 150 scientists' contributions from across the globe shows that, while droughts appear to have had a modest impact on tropical tree growth in ...

Editor’s note: This article was first published in 2023 and has been updated. Ancient semi-fossilized tree rings may hold the clues to the largest solar flare event ever known, which occurred some ...

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 ...

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 ...

Ancient tree rings show that the summer of 2023 was the hottest in the past 2,000 years because of human-caused climate change Esper and his co-authors were motivated to find 2023’s long-term climate ...

If a tree's rings are studied in a lab but no one hears them, do they make noise in the climate movement? An associate professor of oboe at the University of Arizona wondered. It led her to team up ...