Mars Water

Scientists studying two meteorites thrown to Earth from the mantle of Mars-- the layer under the crust of the planet-- have found evidence that the interior of Mars is comparable to the interior of Earth in terms of water content.  That makes sense.  There is a wealth of evidence pointing to a wet early Mars, but where the water went has always been a problem.

Now, the theory is that Mars had abundant water resources at its formation.  Mars' giant volcanoes spewed massive amounts of water onto the surface during a warm, early period, and substantial stores of water remain in the planet's interior.