The new issue of Science groks the fullness of Mars’ missing water:
In a discovery that partly answers the question of where all the water went on Mars, scientists have found vast, debris-covered glaciers much nearer the equatorial region than anyone had expected, according to a report today in the journal Science.
The glaciers, estimated to contain at least as much water as
Lake Huronand possibly as much as the entire Great Lakes, were found by ground-penetrating radar on NASA’s Mars Reconnaissance Orbiter spacecraft.
The NASA computer graphic above shows Martian craters (left) and the distribution of debris-covered glaciers within them (right).