The presence of humans and human infrastructure in U.S. national parks has lasting effects on the behaviors of the large ...

Many summer visitors to America's national parks hope for a glimpse of a moose or a bighorn sheep — or perhaps to spot a wolf ...

The persistent presence of humans and their infrastructure in U.S. national parks has yielded dramatic changes in the ...

The presence of humans and human infrastructure in U.S. national parks has lasting effects on the behaviours of the large animals that call them home ...

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