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The search for water on Mars
The search for water on Mars

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This figure is a map of Mars. It is rainbow colour coded according from red to violet. Violet and blue areas represent low levels of subsurface water. Red areas represent high levels of subsurface water. The north and south pole, and a band across the middle of the map are grey, representing no data collected there. The sub-polar areas are violet and blue colours. Mid-latitude areas, particularly in the northern hemisphere are green to red colours.
Figure 26 The map from Figure 25 is combined with data from the Mars Reconnaissance and Mars Global Surveyor orbiters. This shows the location of water ice beneath the surface of Mars. Image credit: NASA/JPL-Caltech/ASU.

 Mars Odyssey