Beneath the surface of Mars, vast cave systems may be hiding something extraordinary—life. Protected from the harsh radiation and freezing temperatures above, these underground chambers could provide ...

NASA has admitted that an over 300-foot-wide hole in the surface of Mars could be a 'portal' leading to an underground world of alien life. The American space agency shared the shocking image of ...

Using seismic data from NASA's InSight lander, geophysicists have identified a large underground reservoir of liquid water on Mars, potentially enough to fill ancient Martian oceans. The water is ...

NASA has found a large hole on Mars. This hole might lead to underground caves. Scientists think these caves could hold alien life. The US Geological Survey has mapped many potential cave entrances.