[bonesmccoy]

If the traces of water are correct (see post above this one in thread), doesn't it suggest that the planet had far more water than is evident today?

Is it all tied up in the huge Martian poles?

We really need to do radar ranging on the planet to study the depth of the Mars poles.

Do you know if there is any data to suggest that the Mars poles are deeper than expected?

Maybe the planet is in such a deep freeze that the polar caps have all the water from the rest of the planet?

[Paradox]

We really need to do radar ranging on the planet to study the depth of the Mars poles.

Doesn't the Mars Express orbiter have this capability?

[NormsRevenge]

Spirit Reaches for a Closer Look

This image taken by the front hazard-identification camera on the Mars Exploration Rover Spirit, shows the rover's robotic arm, or instrument deployment device. The arm was deployed from its stowed position beneath the "front porch" of the rover body late Thursday night Pacific time. This is the first use of the arm to deploy the microscopic imager, one of four geological instruments located on the arm. (Jan. 16)

+ Larger image