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

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This is a photograph of a wood. In the foreground, the ground is covered in brown leaves with a few small green plants growing in it. In the middle ground a small body of standing water can be seen, with rings forming on the surface of the water from drops that fall into the pond. Behind and to the right of the pond are large trees, extending out to a wood.
Figure 6 A photograph taken in a small wood near the OU campus in Milton Keynes, UK, after some rain. Image: Susanne Schwenzer.

 2 Why search for water?