Add Yahoo as a preferred source to see more of our stories on Google. An active volcano, Mount Rainier has erupted thousands of times during its relatively young life. Photograph by Philip Kramer, ...

Mount Rainier’s quiet, snowcapped profile hides a restless interior that has just rattled itself with more than a thousand tiny earthquakes, a reminder that one of the country’s most dangerous ...

Mount Rainier is America's most dangerous volcano. Scientists warn lahars could devastate 150,000 people with little warning.