This image captured by NASA Mars Odyssey orbiter shows a Martian pit feature on the slope of an equatorial volcano named Pavonis Mons, appears to be a skylight in an underground lava tube.
Martian Pit Feature Found by Seventh Graders
This image captured by NASA Mars Odyssey orbiter shows a Martian pit feature on the slope of an equatorial volcano named Pavonis Mons, appears to be a skylight in an underground lava tube.