Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk population, which had decimated the plant community, in ...

This article is part of The State of Science, a series featuring science stories from public radio stations across the United States. This story, by Heath Druzin, was originally published by Boise ...

An ecological milestone has been unveiled at Yellowstone National Park following the finding of a new generation of overstory aspen trees for the first time in 80 years. This hopeful rebalance of the ...