Yellowstone National Park is celebrating an ecological milestone along with a key anniversary this summer, Oregon State ...

For the first time since the 1940s, new aspens have joined the forest canopy in Yellowstone National Park. Researchers say that wouldn’t have happened without wolves.

The apex predators, restored to the park in 1995, appear to be keeping the local population of plant-eating elk in check, ...

Wolves in Yellowstone National Park will sometimes test their predation skills on lone adult bison. But there can be painful ...

For the first time in 80 years, aspen trees are thriving in Yellowstone National Park in the US, due mostly to the ...

Aspen forest is reclaiming the skyline of Yellowstone National Park after decades of controversy over efforts to return ...

The restoration of gray wolves in Yellowstone National Park has helped revive an aspen tree population unique to the region, ...

Gray wolves were reintroduced in Yellowstone National Park in 1995 to help control the numbers of elk that were eating young ...

Record-breaking Wolf 907F, the alpha of the Junction Butte pack, died after a confrontation with a rival pack at Yellowstone ...

Yellowstone experts debunk viral claims of animals fleeing park due to a volcanic threat. The USGS and park rangers warn ...

From Banff’s ridgelines to Yellowstone’s Lamar Valley, the wolves Mark Hebblewhite first tracked as a young researcher have shaped the course of his career. Now the next generation of scientists ...

An internationally famous Yellowstone National Park bull elk has died, likely killed by the Canyon wolf pack, which was seen feeding on his carcass. Elk No. 10, the last to wear a yellow ear tag ...