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 ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. The jewel-like lakes of the High Sierra in Yosemite National Park are awe-inspiring sights. But for more than a hundred years they ...