Nasa's Spirit rover signs off on Mars
Summary: The space agency has finally given up hope on its Spirit rover, which landed on the red planet in 2004 and went on to make numerous significant scientific discoveries
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Mars 'dust devil'
One of the more interesting phenomenoms encountered on Mars by Spirit was the existance of mini dust storms called "dust devils". Here is a series of images of one dust devil captured in 2007.
Photo credit: Nasa
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