The Palisades cliffs west of New York City rear up from the Hudson River like the spine of some ancient beast—and that impression is not far off. Their basalt backbone is a remnant of an immense lava ...

The geology of Washington state varies wildly from region to region, belying the great medley of events -- ancient and more recent, catastrophic and systematic-- that formed it. And in no part of the ...

Fresh lava looks like the last place anything could live, yet biologists are now finding microbial communities moving in ...

Sometimes, a hole in the ground is just a hole. Other times, it’s a portal to an underground cave spanning miles in width and length. You don’t really know what’s inside unless you dive into the void.

The Mars Express High Resolution Stereo Camera imaged a region close to Ma’adim Vallis, one of the largest canyons on Mars, finding craters, lava flows, and tectonic features. After Valles Marineris, ...

The volcanic eruption on Iceland's Reykjanes Peninsula has now reached the fishing town of Grindavík, engulfing houses in flames. Livestream videos from the area show lava spurting out from a fissure ...