Wolf and grizzly bear sightings are fairly common in Yellowstone. But scenes such as these, illustrating the life-or-death ...

The roars of a grizzly echoed from a riverbank in Yellowstone National Park on Sunday, as it postured with a wolf over a ...

A new clip out of Yellowstone offers a rare look at the brutal reality of kleptoparasitism in the backcountry. Watch a pack ...

Yellowstone National Park visitors recently had a front row seat to watch a pack of wolves hunting a herd of bison, leaving ...

The day after two hikers were mauled by a grizzly in Yellowstone, tourists yelled at rangers who were warning them to ...

You mess with the calf, you get the herd. It's estimated that around 4,500 bison roam around Yellowstone National Park.

A brave bison mother protects her newborn calf from an attacking wolf pack until the rest of the herd arrives to aid in the ...

Once the bear reached the area where the wolves were, the wolves must’ve smelled him ... then all chaos broke out.” ...

Wolves in Yellowstone National Park will sometimes test their predation skills on lone adult bison. But there can be painful consequences. The accompanying footage, captured by Billy Fabian while on a ...

“Since we have to go to Island Park and West Yellowstone tomorrow, why don’t we make a short trip to Yellowstone Park?” asked my wife last Monday evening. She didn’t have to beg as I was up for a ...

A 2,600km² exclusion zone was established following the world's worst civilian nuclear accident at Chernobyl in 1986, which released a radioactive cloud across Europe and led to the evacuation of ...