Sometimes being the hero means making hard choices. Here's our list of good guys (and gals) who cross the line for ... reasons.

A playful Yellowstone wolf pup is giving weekend vibes after he was caught on camera making off with a grizzly bear warning sign—and turning the post into a chew toy. Wolves just wanna have fun.

Add Yahoo as a preferred source to see more of our stories on Google. Like dogs, wolves are fond of playing with sticks. Sometimes very large sticks. The accompanying footage, captured last week in ...

Like dogs, wolves are fond of playing with sticks. Sometimes very large sticks. The accompanying footage, captured last week in Yellowstone National Park, shows a collared wolf pup carrying a signpost ...

A playful Yellowstone wolf pup is giving weekend vibes after he was caught on camera making off with a grizzly bear warning sign—and turning the post into a chew toy. Wolves just wanna have fun.

Yellowstone visitors had a front-row seat to the stark reality of the contest between predator and prey early Sunday, when ...

SALT LAKE CITY — There are debates about how wolves first started down the long path to domestication some 15,000 years ago. Some researchers think they did it to themselves, scavenging near human ...

A lot of research goes into determining how to best predict the next eruption of the Yellowstone supervolcano. Part of this involves pinning down how the magma migration system functions and evolves ...