Yellowstone National Park is huge: 2,221,766 acres or 3,437.5 square miles, over twice the size of the state of Rhode Island.

The restoration of gray wolves in Yellowstone National Park has helped revive an aspen tree population unique to the region, ...

Yellowstone National Park is celebrating an ecological milestone along with a key anniversary this summer, Oregon State ...

It’s the latest development in the ongoing battle over the future of grizzly bear protections in the lower 48.

Yellowstone grizzly bears have surpassed federal recovery goals, but conservation organizations argue they still need ...

YELLOWSTONE NATIONAL PARK, WYO. – Sitting in an old-growth spruce fir forest, Doug Smith says he can see first-hand the impact of reintroducing wolves on the larger ecosystem of Yellowstone ...

A National Park Service (NPS) representative has debunked videos circulating online that falsely claim animals are fleeing ...

In 1995, a bold decision was made that would forever change the course of Yellowstone National Park's ecosystem and economy.

The U.S. House Natural Resources Committee voted on Tuesday to support a bill sponsored by Rep. Harriet Hageman, R-Wyo., to ...

A proposal by a Wyoming Republican representative to remove Endangered Species Act protections from Yellowstone grizzly bears ...

Yellowstone grizzly bears have surpassed federal recovery goals, but conservation organizations argue they still need ...

Experts can't verify for certain if a grizzly carcass recently found in Yellowstone is that of well-known "Raspberry," who ...