Scientists Discover a Mysterious Hole on Mars: What's Inside Could Be Key to Keeping Astronauts Alive There

Could this be a gateway to subterranean shelters for future explorers?

Related Keywords

Hawaii ,United States , ,Nasa Jpl Caltech University Of Arizona ,University Of Arizona ,Whole Mars ,Arsia Mons ,With Mars ,Mars Odyssey ,International Space ,Red Planet ,High Resolution Imaging Science Experiment ,Reconnaissance Orbiter ,Universe Today ,