A pile of Russian thistle, or tumbleweeds, tangled up under a stand of western Joshua trees on the Transition Habitat ...

Have you ever looked at a mountain and wondered why there were trees on one side but none on the other? Or noticed different ...

The Great Smoky Mountains National Park is a major North American refuge of temperate zone flora and fauna that survived the Pleistocene glaciations. The park includes the largest remnant of the ...

Dan Parker has spent four decades cultivating a clientele for his select and expensive trees. This is one job he says he'll never quit.