Pebbles and sand on Mars best evidence that a river ran through it (Science)

By Morgan Kelly, Office of Communications Pebbles and sand scattered near an ancient Martian river network may present the most convincing evidence yet that the frigid deserts of the Red Planet were once a habitable environment traversed by flowing water. Scientists with NASA's Mars Science Laboratory mission reported May 30 in the journal Science the … Continue reading Pebbles and sand on Mars best evidence that a river ran through it (Science)