Imagine trying to tell identical twins apart just by looking at their fingerprints. That's how challenging it can be for ...

That's how challenging it can be for scientists to distinguish the tiny powdery pollen grains produced by fir, spruce and pine trees. But a new artificial ...

No, my plastic fir does not radiate the scent of a freshly cut spruce lovingly felled ... solution in the form of Christmas-tree scented candles. Although pine scents I typically associate with ...

In addition, mountain pine beetles continue to grow in ... The western spruce budworm primarily affects Douglas-fir, true fir and Engelmann spruce trees. Consecutive years of budworm defoliation ...

In an old-growth longleaf pine savanna ... which contain Douglas fir, coast redwood, western hemlock, western red cedar, Sitka spruce and many other tree species, have been compared to cathedrals ...