Fossils Could Be Found by Next Mars Rover, Study HintsA new theory for how oceans formed on ancient Mars also hints at the best spots for future fossil hunts on the red planet. Based on the geology of Mars's northern plains, the new study suggests that bodies of water formed as groundwater slowly seeped through cracks in the crust. This process would have made oceans and lakes quickly—within just a few years—but also could have sustained the bodies o
