Archaeologists have made a fascinating discovery in the Umm Jirsan lava tube system in northwest Saudi Arabia, unearthing ...

A vast underground tunnel known as a lava tube, formed from ancient volcanic activity, was recently discovered lurking beneath Venus.

On Mars or the Moon, researchers use high-resolution optical cameras to spot “skylights,” which are essentially holes in the ...

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 ...