“…”We believe that the deposits of water-ice are juggled between Mars’ North and South Poles over a cycle that spans 51 000 years, corresponding to the time span in which the planet’s precession is inverted.”…water at the North Pole was in an unstable condition and was easily transported to the South Pole in the form of water vapour, to then re-condense and freeze on the surface…” Full Slice - Much is still to be explained about Mars such as that ~6km hemispheric slope in the MOLA data

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