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 National Park.

In the parched summer of 1988, wildfires ripped through more than one-third of Yellowstone National Park during the most severe fire year in park history. Approximately 1.2 million acres scorched by ...

The onslaught of destructive fire and climate change risks turning an area of Western forests three times the size of Yellowstone National Park — about 2.2 million acres — into ecosystems ...

There’s not a grizzly bear in Yellowstone National Park that is willing to mess with a bison herd on full alert. The accompanying footage, captured Monday via the park’s livestream camera ...

As grizzly bear populations in Yellowstone National Park have grown, supervisors of the six national forests surrounding the park in Montana, Wyoming and Idaho have had to be more vigilant ...

Yellowstone livestream camera captures the tense interaction at a time when grizzly bears are emerging from hibernation and obviously hungry. ... with the bear ultimately vanishing into the forest.

Yellowstone livestream camera captures the tense interaction at a time when grizzly bears are emerging from hibernation and obviously hungry. ... with the bear ultimately vanishing into the forest.

Yellowstone livestream camera captures the tense interaction at a time when grizzly bears are emerging from hibernation and obviously hungry. ... with the bear ultimately vanishing into the forest.

Yellowstone livestream camera captures the tense interaction at a time when grizzly bears are emerging from hibernation and obviously hungry. ... with the bear ultimately vanishing into the forest.