Under California's Sierra Nevada Mountains, dense rock at the bottom of the lithosphere is playing a game of "I'm outta here," detaching and sinking into the Earth's mantle.

The Sierra Nevada mountain range boasts some of the best rock climbing, clearest alpine lakes, and most epic ski terrain in the world. But the story of the Sierra Nevada goes far beyond humanity’s ...

California's drought conditions improved after early winter storms brought widespread rain and much-needed snow in the Sierra Nevada Mountains. Nearly 98 percent of the state remains in at least ...

MAMMOTH LAKES — Flying thousands of feet above the Sierra Nevada in a plane equipped with specialized imaging devices, Elizabeth Carey has been scanning the mountains with lasers to precisely ...

Cold temperatures made a rare visit to the Sierra Nevada mountains in California and left behind snowfall this weekend, according to officials.. The middle and higher elevations of Sierra Nevada ...

Cold temperatures made a rare visit to the Sierra Nevada mountains in California and left behind snowfall this weekend, according to officials. The middle and higher elevations of Sierra Nevada in ...