Some west Sonoma County residents are on high alert after several mountain lions were seen on camera walking through a neighborhood last week. Outdoor home security cameras caught the mountain lions, ...

The young mountain lion seen wandering in the Pacific Heights neighborhood of San Francisco is back in the wild. The Department of Fish and Wildlife shared this video of the big cat being released in ...

What do mountains reveal about primates? Mountains have a unique effect on diversity, messing with our understanding of animals through time, and pretty much just making evolution weird. And they ...

Colorado Fourteeners Initiative has come up with an eye-catching way to warn climbers and hikers that poor decisions on the state’s highest peaks can kill them. A new series of mountain safety videos ...

Jan Beutel was half-watching a live stream of Kleines Nesthorn, a mountain peak in the Swiss Alps, when he realized its cacophony of creaks and rumbles was getting louder. He dropped his work, turned ...