Every garden is a thing of beauty in the growing seasons — spring bulbs, summer flowers and fall foliage all carry on with extravagance. But winter is coming, so the colorful garden superstars will ...

Clockwise from top left: (1) Two lodgepole pines growing side-by-side with notably different bark textures, (2) a rough-barked limber pine that has been attacked by bark beetles, (3) a limber pine ...

Trees with smoother bark are better at repelling attacks by mountain pine beetles, which have difficulty gripping the slippery surface, according to a new study. Trees with smoother bark are better at ...