Rather than assuming that modern Mars is too cold and dry to sustain liquid water, new evidence is challenging that belief. Data from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument has revealed unusually…

Rather than assuming that modern Mars is too cold and dry to sustain liquid water, new evidence is challenging that belief. Data from the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument has revealed unusually…