Behind the scenes, Smithsonian care teams welcomed four animal babies from three imperiled species: Hartmann’s mountain zebra ...

Dogs and human inspectors are checking boats for golden mussels at some lakes, but a patchwork of oversight leaves many lakes unprotected.

A rock climbing outing turned fatal for one National Park visitor after authorities say a fall resulted in his death.

Feral critters have taken over California's Yosemite National Park, and experts and visitors fear this might just be the tip of the iceberg.

National Park Service officials confirmed a fatal climbing accident at Glacier National Park where a 42-year-old man fell while descending a steep, off-trail route.

A 42-year-old Utah man died after he fell while descending a mountainside in Glacier National Park in northwestern Montana, authorities said Friday.