If Utah’s quaking aspen appear to be quaking more than usual this summer, the trees have reason to tremble, says a Brigham Young University biologist. In dappled forests across the West, aspen trees ...

A treasure trove of gold In October, the quaking aspen groves in June Lake, California, glow with vivid hues of yellow — and nothing sets off these colors like a crisp, clear autumn day. While there ...

PAONIA, COLO. — From the hillsides of extinct volcanoes in Arizona to the jagged peaks of Idaho, aspen trees are falling by the tens of thousands, the latest example of how climate change is ...

Quaking aspen (Populus tremuloides) is the most widely dispersed tree in North America. It is found growing across the northern regions of the United States and Canada from the Atlantic to the Pacific ...