NPR's Ayesha Rascoe speaks with Kerry Gunther, the Bear Management Biologist for Yellowstone National Park, about the traffic jams caused by tourists gawking at grizzly bears.

With dramatic peaks and pristine lakes, Yellowstone National Park is an outdoor enthusiast's paradise. Multicolored pools ...

But at the end of a trip to Yellowstone, visitors who bought bear spray as a precaution find themselves with a problem. Bear spray, a flammable aerosol, isn’t allowed on airplanes. And for travelers ...

This article was published before the grizzly bear incident that left a Florida hiker dead in Glacier National Park. Read ...

A new scientific review challenges the headline-grabbing claim that Yellowstone’s returning wolves triggered one of the strongest trophic cascades on Earth. Researchers found that the reported 1,500% ...

A team of researchers is sounding the alarm after a "brain-eating amoeba" was found in some of the nation's most iconic parks ...