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Mars

The flow and ebb of water

Information is pouring in about Mars. These are thrilling times for those who are proposing — and challenging — ideas about the chemical evolution of the planet and its potential for having harboured life.

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Figure 1: Opportunity's site of operation.
Figure 2: Sulphate, sulphate everywhere.

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Bullock, M. The flow and ebb of water. Nature 438, 1087–1088 (2005). https://doi.org/10.1038/4381087a

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