BBC: 'Up to half' of Mars may have ice

BBC NEWS | Science/Nature | 'Up to half' of Mars may have ice: "Scientists in the US say that initial data from a new way of scanning Mars has shown up to half of the Red Planet's surface may contain ice.

The new method of scanning for water offers vastly more accurate readings than before, they say.

The data could prove vital for the Phoenix Mars Mission which launches this August and which will put a lander on the surface to dig for ice.

The new data shows wide variation as to how deep below the surface ice exists."