Ever wonder how many trees stand tall in North America's vast boreal forest? A new University of Alberta study has the answer ...

Firefighters rescued a tree worker who became stuck upside down while 30 feet in the air. Related video: What happens when ...

Imagine walking through a forest and realizing that once-iconic trees—trees that shaped entire ecosystems and inspired ...

The highest recorded elevations of Jeffrey pines provide new evidence of a warming climate in the High Sierra. UC Davis ...