New Images Downplay Reports Of Recent Flows
NASA tells ANN the agency's Mars Reconnaissance Orbiter is
examining several features on Mars that address the role of water
at different times in Martian history. Features examined with the
orbiter's advanced instruments include material deposited in two
gullies within the past eight years, polar ice layers formed in the
recent geologic past, and signs of water released by large impacts
when Mars was older.