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

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

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

For the first time in 80 years, a new generation of fully-fledged aspen trees has grown in Yellowstone’s northern range.

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

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

Researchers with Colorado State University spent two decades studying the ecosystems in Yellowstone National Park, with the goal of learning whether or not the reintroduction of wolves had any ...

Analysis of 6,000-year-old trees that melted out of a Beartooth Mountain ice patch provide a greater understanding of how current climate change could affect the Greater Yellowstone Ecosystem.

An experiment spanning more than two decades has found that removal of apex predators from an ecosystem can create lasting changes that are not reversed after they return -- at least, not for a ...

The population of grizzly bears in the Greater Yellowstone Ecosystem, although increasing by roughly 2% a year, seem to have stabilized at around 850 to 900 animals. Jake Davis, Revealed in Nature ...

Yellowstone Lake, with a surface area of 341 square kilometers (132 square miles) and sitting 2,357 meters (7,733 feet) above sea level, is North America's largest high-elevation lake.