At one time, perhaps as many as 2 million gray wolves roamed the North American continent. But now those numbers are down to a few thousand.
New research studies the factors that determine whether large carnivore reintroductions will be a success.
When it comes to cleaning up land contaminated by toxic waste, we can follow nature’s example before humans populated the earth.
Yellowstone’s destructive flooding was a taste of the risks ahead in a warming world, and it’s just one example.
Yellowstone’s destructive flooding was a taste of the risks ahead in a warming world, and it’s just one example.
The area's iconic national parks are home to grizzlies, elk and mountain snowfall that feeds some of the country's most important rivers. A new report show the changes underway as temperatures rise.
The area's iconic national parks are home to grizzlies, elk and mountain snowfall that feeds some of the country's most important rivers. The region is warming quickly.
It's hard to preserve national parks "unimpaired," as US law directs, when they're overrun with tourists who stray off paths, strew trash and harass wildlife. A parks scholar calls for crowd control.
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