Re:Don't wait until we get to Mars... (Score 5, Informative)

Ground penetrating radar will likely not be as effective in places like africa which tends to have a lot of salt in the ground in areas where water is no longer available. This technology is often used by the military in order to find things like hidden weapons and landmines, though is virtually ineffective in many desert areas due to the sodium deposits from salt. fortunately for mars, there probably isn't the problem with salts in the soils, and this method should be highly effective.