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

Quaking aspens store chlorophyll beneath their bark (particularly in younger trees), this is what gives the trunk a greenish cast. This helps them to continue to produce sugars, at least when the days ...

Earth's largest and oldest organism, the Pando aspen tree in Fishlake National Forest in Utah, is being eaten alive by ...

Populus tremuloides, the quaking aspen of the North American continent, stands as one of the most easily recognized, most beautiful and most admired of all tree species. In order to help ...