Even with all our satellites, sensors, and science, the natural world still manages to surprise us. There are certain animals ...

Jeffery Starn and Jessica Hamel submitted this photo of an Anise Swallowtail (Papilio zelicaon) that was taken during a hike ...

After three years of scouting, Randy Robbins filmed a subspecies of red fox that lives only in high elevations in the Sierra Nevada mountains this past winter, the photographer said in a video posted ...

A giant burrowing salamander fossil challenges assumptions about amphibian evolution in prehistoric Appalachia. A giant salamander with powerful jaws once burrowed through the ancient soil of what is ...

For example, some animals have thicker fur to keep warm, while others have developed specialized hooves for navigating steep terrain. What are the environmental threats faced by mountain animals?