Think you’re brave? These 10 claustrophobic hikes in the U.S. feature tight squeezes, narrow canyons, and adrenaline-filled ...

Discover winter activities and family-friendly things to do during a visit to a Bavarian-themed village in Leavenworth, ...

Washington in winter is an outdoor lover’s paradise. There are all the snowy season classics like skiing and snowboarding, winter markets, and... The post Winter in Washington: 20 Adventurous and ...

We now know for sure that massive underground tunnels, carved by lava, exist on Venus – and they are surprisingly wide and different from those on any other planet. It is uncontroversial that lava ...

Astronauts train to scale a Mars volcano at an analogue site in France. Lava tubes that crisscross the Martian surface might provide sanctuaries for the first human explorers on the Red Planet. (Photo ...

This lava tube is reportedly the third-longest in all of North America, trailing Hawaii’s 40-mile Kazumura Cave and the less-publicized 9-mile Deadhorse Cave system near Washington’s Mount Adams.

To explore volcanic tunnels on the Moon or Mars, send a team of specialized robots. Researchers have demonstrated this approach in tests on Lanzarote, an island in Spain, with one rover helping ...

The Lava River Cave exhaled chilled air. I put on my sweatshirt, despite the hot July day. Though I'd been warned about the sudden drop in temperature to a crisp 42 degrees, it was hard to believe I'd ...

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 ...

The practice area will provide proving ground for robotic autonomous exploration. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. China has taken ...

Rescuers hoisted a trapped caver 300 feet out of a lava tube in a Utah park, officials said. Santa Clara-Ivins Fire and Rescue on Instagram A trapped caver was hoisted 300 feet from a lava tube in a ...