Scientists examining the Moon have for the first time discovered a cave on Earth's only natural satellite.Why it matters: The underground cavity that's at least 130 feet deep could be an ideal location for humans to build a base in which to stay,

Scientists have for the first time discovered a cave on the Moon. At least 100m deep, it could be an ideal place for humans to build a permanent base, they say. It is just one in probably hundreds of caves hidden in an “underground, undiscovered world”, according to the researchers.

The moon is hostile to human life and its surface is exposed to powerful levels of cosmic radiation - but experts believe the underground caves could be "suitable for habitation purposes".