The landscapes in these Nevada national parks are varied and eye-catching, from snow-capped mountains and deep canyons to ...

California has no shortage of geological marvels, many tucked within one of the state’s national parks. But to view a fossilized, dry waterfall formed hundreds of thousands of years ago from an ...

A volcano in Ethiopia that last erupted when human civilization was still in its infancy has roared back to life, sending ash into the sky and lava across a sparsely populated landscape. After roughly ...

Deep inside Earth, far below the crust and mantle we learn about in school, scientists are mapping strange, continent-sized ...