Pando is an ancient quaking aspen tree (Populus tremuloides) with 47,000 genetically identical stems, or tree trunks, connected to a vast underground root system. Each stem is a clone of the one ...

They've noticed that most of the aspen trunks are relatively old and when new shoots do develop, they don't last long enough to become full-fledged trees. Scientists have a couple of theories why ...

Careful examination of an aspen trunk reveals that it is slightly green in colour, and this indicates the presence of chlorophyll there. This enables the tree to absorb a small amount of the sun ...