Mysterious Mars Pits: Gaze into the abyss with these wild NASA images @The Cosmos News

Mars pits: Gaze into the abyss with these wild NASA images The planet isn t just mountains, craters and plains. It also has a collection of bizarre pit-like formations that capture the eye and the imagination. Mars has hidden depths hinted at by intriguing pits scattered around the planet. Some of these tantalizing windows may be entrances to underground caverns. If humans ever make it to Mars, they may want to consider hunkering down underground to protect themselves from space radiation. @TheCosmosNews