Mars holds vast stores of water ice right near the surface and away from the permanently frozen south polar ice cap, scientists say. This means it?s possible that life may have once existed on Mars or could still be there.
?There?s a lot of ice on Mars,? says William Boynton, who made the discovery. ?We really have a whopping large signal.? What he?s spotted is hydrogen, which is one of the components of water. Boynton and his colleagues believe there is actual water ice at the surface, as well as a few feet down.