Most people are familiar with the notion that "tree rings" — the concentric bands visible on a cross-section of a tree's trunk — serve as an indicator of a tree's age. Dendrochronology is the practice ...

If you cut down a tree, you can read in the wood an environmental record. Now climate change is complicating the narrative. In a basement in Tucson, Ariz., slices of tree trunks stand on shelves. They ...