Young aspens often don't survive because of factors such as grazing elk, according to a study by Northern Arizona University ...

Essentially, the aspen forest has been littered with young trees that are not capable of growing up and reaching adulthood.

Aspen has distinctive, almost-circular leaves with flattened petioles or stems. This flattening causes the leaves to tremble ...

FLAGSTAFF — Beneath the scenic yellow and red leaves of soaring aspen trees in the Kachina Wilderness, forest ecologist Mike Stoddard is looking down. His concern isn’t the brilliant fall ...