The animal kingdom is full of fascinating tricks for enduring sub-freezing temperatures. Birds, for example, often just take flight for warmer parts unknown the moment a frost hits their environment.

The jewel-like lakes of the High Sierra in Yosemite National Park are awe-inspiring sights. But for more than a hundred years they've also been biologically disrupted, stocked each year with ...

Hundreds of the animals were loaded into coolers and hiked into the backcountry.

Lassen Volcanic National Park in far Northern California is a rugged wonderland of lava flows, cinder cones and boiling pools. It is also dotted with welcoming meadows and alpine lakes - places a ...

Crawfish frog numbers are on decline due to habitat loss. But scientists in Indiana are working to return species to a historic site. When frogs start disappearing from a place that they've been in ...