Horizontal cross sections cut through a trunk of a tree can tell us a little about the history of a tree in its own time ...

Tom Swetnam, the director of the Arizona tree-ring lab, grew up with wildfire. His father was a forest ranger in northern New Mexico, and after Swetnam graduated from college in the late 1970s, he ...

Scientists have long relied on tree rings to learn about ancient solar storms—rare bursts of high-energy particles from the ...

Tree rings hold clues about ancient solar storms. New research shows tree growth and carbon storage can shift those signals across years.

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 ...

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 ...

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 ...