widely known as lava tubes, are formed in a geological instant—a year or two, sometimes weeks—by an eruption from the Earth’s crust. Most of Hawaii’s lava tubes are formed by a type of ...

If these lava tubes are anything like Earth's, they could be the perfect place for astronauts to hunker down during their stay on Mars. "There's more than one of these [pits] on Mars that we've ...

The Moon is exposed to radiation levels 150 times higher than Earth. Lunar lava tubes offer excellent protection from harmful solar and cosmic radiation, as well as micrometeoroids. Moreover ...