A team of Chinese researchers has identified eight caves in Mars’ Hebrus Valles that may have been sculpted by water. These ...

A mile and a half beneath the ocean’s surface, the seafloor seems nearly as alien as the surfaces of other planets. Deep-sea volcanic ridges, formed by the collisions of tectonic plates, create ...

SAN VICENTE PACAYA, Guatemala -- It's the only place in the world where you can hike up a volcano and once done, enjoy an artisanal pizza cooked inside a volcano! Based in Guatemala, Pizza Pacaya was ...

The Chauvet-Pont D'Arc cave is one of the most famous underground caverns in the world, housing one of the oldest and best-preserved collections of prehistoric cave paintings ever discovered. Now, ...

A staircase leads to the entrance of the Lava River Cave at Newberry National Volcanic Monument. (Courtesy Dylan Lipke) When it feels difficult to escape the summer heat, sometimes it helps to head ...

Oregon has no shortage of staggering natural beauty, from prominent icons like Mount Hood to under-the-radar marvels like the secret "Iceland-esque" Abiqua Falls just south of Portland. Yet Oregon's ...

Volcanic rock in the lava tubes created a protective environment that helped shield the minerals and organic compounds from weathering, ultimately preserving the minerals as records of past ecosystems ...

One the John Muir's finest pieces--and one of my favorite pieces of writing--is about surviving a sudden snowstorm with the help of fumaroles. The whole thing is very much worth reading. Our ...