“In the two-hour [Lava Falls] tour, there’s lots and lots of features that I can show people. We go less than a third of a mile into the cave, and I explain a lot of the geology,” Shick says. “The ...

Add Yahoo as a preferred source to see more of our stories on Google. 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 ...

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.

View post: Most Runners Ignore These Two "Tight" Spots Until They’re Sidelined. This Is the Podiatrist-Approved Way to Spot the Warning Signs View post: 29 Years Ago, Konami Released One of the ...

Centuries of eruptions on the Big Island have created hidden networks of passages beneath volcanoes. In December 2016 a large lava delta formed by Kilauea volcano sank into the sea, exposing the mouth ...

A dazzling type of actinomycete coats several cave areas at Lava Beds National Monument. Image courtesy of National Park Service A hint of vegetation among the ancient lava rubble at Lava Beds ...

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 ...