America’s most unique ecosystems weren’t just created by time—they were sculpted by powerful geological forces. From volcanic eruptions to shifting tectonic plates, these natural wonders shaped the ...

A colossal volcano in Alaska is likely to erupt soon, scientists warn. Mount Spurr, an 11,000-foot-tall volcano on the Cook Inlet about 75 miles from Anchorage, has a 50-50 chance of spewing out hot ...