The Mars Rover, Curiosity has been drilling in rocks over the last few weeks and the US Space Agency has reported that it has found a significant indicator of past water. The robot has drilled into a rock that contains clay minerals - minerals that are only found in rocks that have formed under conditions of or altered by neutral water. This is another step forward to showing previous conditions on the red planet and whether it could have supported life. The clay deposits may not show direct indication of life on the planet but show favourable conditions.
Already, it has revealed the remains of an ancient riverbed system, where water
once flowed perhaps a metre deep and quite vigorously.
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