A provocative new hypothesis suggests that Yosemite Valley was carved by an ancient volcano and a disappearing river ... who ...

A river that drained the slopes of a now-vanished volcano may have carved Yosemite Valley's depths during the last 10 million years.

From Acadia to Zion, there are health concerns across the National Park System tied to poor air quality conditions that the ...

Before setting out on this journey, I did my research. The question that kept ... truly be called the best California national parks. Yosemite National Park: Surpassing all National Parks in ...

Reduced staffing could mean trouble for everything from protecting park resources to providing interpretive services to managing long-term research ... Wyoming. Yosemite National Park, in Northern ...

But it contains the largest mountain range on earth, canyons far grander than the Grand Canyon and towering vertical cliffs rising up three miles—more than twice the height of Yosemite’s ...

Magma activity in underground volcanic systems can cause gases like water and carbon dioxide to form bubbles, which can accumulate and fuel dangerous eruptions. Thankfully, the research indicates that ...

Using advanced technology that analyzes tiny gas bubbles trapped in crystals, a team of scientists led by Cornell University ...