A professor's casual hike in the High Sierra turned into a new elevation record for California's highest tree, the Jeffrey pine, which wasn't formerly known to grow at extreme elevations. UC Davis ...

For the second year in a row, The Morton Arboretum’s Tree Root Biologist Luke McCormack, Ph.D., has been recognized as one of the most cited and influential researchers worldwide by global information ...

Every year, the Christmas tree debate returns: Is it better to cut down a natural tree for a short-lived holiday display, or use an artificial one made from non-recyclable plastic? The answer is not ...

Spruce bark beetles don’t just tolerate their host tree’s chemical defenses—they actively reshape them into stronger ...

They may be lovelier than poetry, but if you don’t know how to identify them, what’s the point? Students from Debbie Valerio’s 4th-6th grade science club at the Windham-Ashland-Jewett Central School ...

Trees have more complex life histories than previously thought, which scientists must consider to forecast greenhouse gases in the atmosphere and plan conservation efforts. Researchers assembled a ...

Fall leaf color and climate change, urban trees, heat islands and downtown honeybees. Why do leaves change color in the fall, and how will climate change affect that rainbow of color? Plus, urban ...

Every year, as the leaves turn and a chill enters the air, a familiar debate lights up social media feeds. The question is simple yet divisive: when is the right time to put up the Christmas tree?