New tech is helping researchers better understand Yellowstone's apex predators.

Toddlers are always up to no good... even in the Animal Kingdom. The National Park Service says that Yellowstone National Park is home to the largest concentration of mammals in the lower 48 states.

A viral photo of a wolf carrying a grizzly warning sign is more than just funny—it’s a reminder of who really runs the park.

Yellowstone National Park is the country’s first national park, established in 1872. At the time, wild gray wolves roamed the land, and fossil records show the species’ presence in the region dating ...

The accompanying footage, captured last week in Yellowstone National Park, shows a collared wolf pup carrying a signpost ...

This spring, the prolific author, former park naturalist and wolf interpreter has turned his focus inward, a memoir that also includes stories of moose, a grizzly bear and wolves.

A Yellowstone wolf showed its more playful side Monday, somehow removing and carrying off a sign put up warning tourists ...

YELLOWSTONE NATIONAL PARK, Wyo. — Snow crunched underfoot as Mark Hebblewhite scanned the ridgelines of Canada’s Banff National Park. It was 1995, and the young biologist, fresh out of undergrad, was ...

An adolescent wolf was caught on camera running across a road carrying a wooden signpost in its mouth.

Get any of our free daily email newsletters — news headlines, opinion, e-edition, obituaries and more. Yellowstone National Park’s wolf population has declined from last year, according Yellowstone ...

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

Gray wolves now living in the Chernobyl exclusion zone also show a new genetic resistance to cancer, researchers have found.