Since the early 2000s, the emerald ash borer has been a thorn in homeowners’ sides—or anyone with trees in their yard. These invasive insect pests cause oft-catastrophic damage to ash trees, and ...

From the Griswolds to the Grinch, almost every holiday movie features characters cutting, decorating or stealing the perfect Christmas tree.

A tiny 3-millimeter beetle burrows into the heart of a centuries-old white oak in Oregon's Willamette Valley, tunneling through bark while spreading a lethal fungus. What begins as subtle wilting ...