Pando is an ancient quaking aspen tree (Populus tremuloides ... But according to a 2018 study, aerial images taken of Pando over a period of 72 years show stark signs of decline, including ...

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 ...

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