The story of gray wolf recovery in Yellowstone is hailed as one of the world's greatest conservation success stories, but many fear that the population is once again threatened.

A century ago, resident wolves were eliminated from the park. In 1995, biologists brought them back, marking a historic ...

Thirty years after wolves were reintroduced to Yellowstone National Park, researchers say aspen trees are showing stronger signs of recovery. The findings add to growing evidence that restoring a top ...

In 1995, Yellowstone National Park became the centre of a conservation experiment that would later be celebrated across the world. Fourteen grey wolves were reintroduced after an absence of nearly 70 ...

Yellowstone National Park is often told as a story of recovery. Wolves returned and then elk changed their behavior. Willows and aspens then rebounded and rivers, it is said, changed course. The ...