Polar Ice

Mars Express Confirms Lots of Polar Ice! Where's the Rest?
Jeffrey Plaut is a Jet Propulsion Lab Principal Scientist and also a Co-Principal Investigator on the MARSIS radar carried by the European Space Agency's Mars Express Orbiter. On this site he talks about what the instrument has learned about the 2.5-mile thick ice at the Martian south pole and about where the rest of the Red Planet's once vast amount of surface water may have gone.