After almost 10 years of roaming the red planet, the Opportunity rover has made a new discovery that offers scientists more clues about Mars's watery history.
NASA researchers announced Friday that a rock that was examined by the rover last month, and which they named Esperance 6, contains clay minerals, pointing to the existence of water on ancient Mars.
Read the whole article below.http://www.cbc.ca/news/technology/story/2013/06/07/tech-mars-opportunity-rover-anniversary.html

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