Add Yahoo as a preferred source to see more of our stories on Google. A western pine beetle rests on a sap mound on a pine tree. - Charles Wollertz/Getty Images A thriving pine tree is a thing of ...

Is your pine tree dying? Perhaps, but probably not. Let’s take a close look at your tree and see if there’s anything to worry about, or anything you need to do. Many Pine trees turn yellow this time ...

Disease-resistant trees and climate-refugia mapping are driving ambitious plans to bring back iconic, threatened alpine tree ...