Once you look at trees through the eyes of a dendrochronologist, you never quite see the leafy wonders the same way again. Peel away the hard, rough bark and there is a living document, history ...

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 ...

“I was really excited,” said researcher Ignacio Mundo. “The last ring corresponds to 1849, and knowing the Dolphin was launched in 1850 — you say, okay, we are really close.” PROVIDENCE — For years, ...

PLATTEVILLE, Wisconsin (Wisconsin State Journal ) — Some people use clocks and calendars to track time. Evan Larson and Christopher Underwood use trees. Across a valley, they can recognize the ...

Like careful note-takers during the past 1,250 years, Engelmann spruce trees high in the Yellowstone National Park backcountry have left behind a record of how harsh summer temperatures have been. A ...

TUCSON, Ariz. (KGUN) — What do trees and fish have in common? It’s an important question the University of Arizona is answering. The school’s Laboratory of Tree-Ring Research (LTRR) is the world’s ...