From The Daily Mail:
When one of Nasa's rovers became stuck in a sand trap on Mars six months ago, scientists were frustrated it had stalled their search for water on the surface.
Now it appears it could have been the best thing to have happened to the mission.
As Nasa span the Spirit rover's wheels to try and manoeuvre it out of the ditch, they simply dug deeper into the soft sand. However this had churned up an intriguing bright fluffy material from the disturbed soil.
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