I was up in the White Mountains this weekend, walking out to my car in the AMC’s Highland Center parking lot after a hike, ...

At that altitude, groves of aspen and willow trees were radiant with fall color ... and the spectacle works its way downhill ...

While the Rocky Mountains are justly famed in the winter for world-class skiing and snowy peaks, the lesser-visited months of ...

Northern Arizona is famous for its aspen trees, and a multi-decade study looks into how they’re being affected by climate ...

I’m pretty sure this was a quaking aspen (Populus tremuloides ... in four species (over 300 trees) and found that while the wood in the trunk stopped growing in autumn when the leaves fell ...