For decades, biologists have known that grizzly bears climb Greater Yellowstone’s highest mountains to gorge on one of the bears’ more surprising food sources: the army cutworm moth. Now researchers ...

A herd of bison gorged on fresh green grass while roaming the town of Mammoth, Wyoming, on the northwest edge of Yellowstone National Park, on Tuesday, April 29. Video from local resident Cindy ...

There are many animals that call the Appalachian mountains home. Their presence has helped cultivate Appalachian culture and ...

Mule deer bucks, especially during mating season, are prone to aggressive behavior, using their antlers to fight one another, ...

A herd of bisons were seen scratching an itch on trees at the Specimen Ridge area of Yellowstone National Park. “Everybody asks me how come the trees are all rubbed. This is why,” said Cindy Shaffer, ...

Fuller had been to Yellowstone once as a kid, and he remembered it as overcrowded and full of road construction. But a road ...

This story is part of a Grist package examining how President Trump's first 100 days in office have reshaped climate and ...