A group of 16 California 7-th graders, from Evergreen Middle School, were participating in The Mars Student Imaging Program when they made a rare find.  They spotted a pit crater in one of the pictures they commissioned.  Pit craters are basically a skylight on the roof of a cave.

"This pit is certainly new to us," Cushing told the students. "And it is only the second one known to be associated with Pavonis Mons."

Way to go kids!

Clara Moskowitz has more: Link

Photo: NSA/JPL-Caltech/ASU