In a groundbreaking discovery in the arid deserts of northern Saudi Arabia, archaeologists have unearthed evidence that human beings once lived within cave-like lava tubes, marking the first instance ...

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.

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.

If humans ever land on Mars, "lava tubes" on the red planet may be the best hope of providing natural shelter or basic habitats, researchers say. A recent study led by Antonio Paris, chief scientist ...

A Canary Islands volcano pushed rivers of molten lava through the earth. Now scientists and explorers trek through the cooling underground, looking for insights into life on this planet—and perhaps on ...

A four-year, $1.29-million grant from the National Science Foundation has been awarded to University of Hawai'i at Mānoa researchers from the School of Life Sciences to study subterranean biodiversity ...

Nahuku Thurston Lava Tube in Hawaii Volcanoes National Park is one of the most amazing natural wonders you can visit and explore on the Big Island of Hawaii. The short walk provides an amazing ...

A NASA robotics team drives a test rover into Valentine Cave at California’s Lava Beds National Monument. The expedition was aimed at testing technologies for exploring lava tubes on the moon and Mars ...