Nearly 25 years after wolves were reintroduced, the predators have helped parts of the park bounce back but haven't completely restored Yellowstone.

See our letters to the editor policy. This article appeared in the print edition of the magazine with the headline Flooding could breathe life into Yellowstone ecosystem.

Todd Koel, Yellowstone’s lead fisheries biologist and author of a science assessment, wrote that in 1998 alone, the estimated 125,000 lake trout consumed between three million and four million ...

Sharing a meal with a greedy tablemate makes for fraught relations, especially when there are claws and fangs involved. For wolves and grizzly bears in Yellowstone National Park, competition over ...

A new documentary series about Yellowstone displays the dynamic, dramatic and exciting ecosystem that thrives within the park’s gates.

A new study calculates the long-term effects of reintroducing wolves to Yellowstone National Park in the 1990s, which ultimately helped willow trees that feed wildlife in stream habitats.

Yellowstone’s ecological transformation through the reintroduction of wolves has become a case study for how to correct out-of-balance ecosystems. But new research challenges that notion.

An eponymic, impending example of this danger lies in America’s iconic Yellowstone, home to all species known at the time of the Louisiana Purchase and the explorations of Lewis and Clark.

If the reintroduced wolves remain in Yellowstone, scientists think, a transformation in relationships among the ecosystem’s wild inhabitants will take place.

Large fires in Yellowstone National Park could dramatically increase by mid-century due to climate change, which could create a very different park than the one people know today, a new study ...

Reintroduction of the gray wolf to Yellowstone National Park has boosted an important food source for the threatened grizzly bear, researchers have found in an example of how the return of a top ...