Yosemite Valley, located in California’s Sierra Nevada mountains ... an ancient “ghost” river and an extinct volcano may have played a large role in carving Yosemite’s dramatic U-shaped ...

"Although evidence for such massive eruptions is found throughout the geologic record, our investigation of magmas frozen below long-extinct volcanoes in California's Sierra Nevada led us to ...

California Department of Fish and Wildlife Once thought extinct until their rediscovery in 2010, endangered foxes have now been spotted 100 miles away near a Sierra Nevada national park ...